Where is the regulator on a Mercedes fan blower?

The Mercedes Benz fan blower motor regulator is a series of resisters in a printed circuit board about 2-inches square located right next to the blower motor.

Why does my AC blower motor not work?

The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. This may also cause the blower motor to work intermittently.

Where is the resister on a Mercedes Benz fan?

Just to the left of the blower motor, an electrical connector connected to a flat 1-inch-by-2-inch plate can be seen. This is the blower motor resister, which controls the fan speeds. Disconnect the multi-wire connector from the blower motor resister next to the blower motor. Start the car and turn the air conditioning on.

Why is the resistor not working on my blower?

Hi There, The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all.

Why is my Mercedes Benz blower motor not working?

If there no power is found, the blower motor resister is the culprit and needs to be replaced. As a note, 85 percent of the time when the blower motor does not come on or operates at one speed only, the blower motor resister is at fault. The resister emits substantial heat from the resistance it supplies and eventually burns up.

Where is the blower motor on a Honda Accord?

Locate the blower motor. The motor can be seen hanging down close to the passenger kick panel. Just to the left of the blower motor, an electrical connector connected to a flat 1-inch-by-2-inch plate can be seen. This is the blower motor resister, which controls the fan speeds.

What are the symptoms of a worn out blower motor?

One of the symptoms of a worn out blower motor is that it can intermittently produce a loud screeching noise when running. How to test a blower motor? If the blower motor doesn’t work at all, the blower motor itself must be tested first. Typically it’s done by measuring the voltage at the blower motor connector when it’s turned on.

How much does a Lasko blower fan cost?

Blower Fans Blower Fans B-Air Lasko RIDGID $50 – $100 Green Voltage (volts): 110 Shop Savings 47Results Sort by:Top Sellers Top SellersMost PopularPrice Low to HighPrice High to LowTop Rated Products Get It Fast In Stock at Store Today (4) Cumberland & nearby stores Free 2-Day Delivery (4) Availability Hide Unavailable Products Department

Where to buy blower fans at Home Depot?

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Where is the blower motor on a Mercedes?

Look at where the wiring comes out of the top of the box where the blower motor is located. They come out on the left/driver’s side. Follow them to a terminal block located on the firewall near the power brake vacuum booster. One should be ground/earth.

Where does the wiring come out of a blower motor?

What are the symptoms of a bad blower motor relay?

3. Melted relay. Another more serious symptom of a problem with the blower motor relay is a burned or melted relay. Relays are exposed to high current loads and can sometimes get hot when they develop problems.

What causes a Mercedes SL Class R129 to over heat?

A stuck close thermostat will create over heating and if it is stuck open the engine will run too cool. If your overheating and one coolant pipe is hot and the other is cold you may have a bad coolant pump. A clogged radiator can cause overheating and a broken hose can leave you stranded.

Where did the Mercedes Benz SL Class come from?

The idea of creation belongs to Max Hoffman, an importer of luxury European cars in the USA in the 1950s, who evaluated the model’s sales opportunities, taking into account the availability of wealthy Gran Turismo car enthusiasts in the rapidly developing post-war American market, which is still the main market for SL- class.

The Mercedes Benz fan blower motor regulator is a series of resisters in a printed circuit board about 2-inches square located right next to the blower motor.

When did my Mercedes Benz blower motor resistor stop working?

Hello to you, When I first became the new owner of my beautiful sl500 here in sunny Florida it was April still not too hot. got the car home used 1997 as is no warranty the fan speed started to drop. Then after a few days nothing no fan speed at all. I also was getting a noise when turning sharply. the blower motor mount.

When did my Mercedes SL500 lose its fan speed?

By the way I am in Birmingham, AL. Hello to you, When I first became the new owner of my beautiful sl500 here in sunny Florida it was April still not too hot. got the car home used 1997 as is no warranty the fan speed started to drop. Then after a few days nothing no fan speed at all.

Why is my W140’S class blower not working?

The symptoms are similar to low fan rpm, just restricted airflow. This fan is the original in my 98 S500. Notice the corrosion here and there – and I removed it to clean it up about a year ago. The motor bolts and the aluminum case itself seem to be subject to corrosion.

How is the blower motor on a Mercedes 140?

The blower motor on a 140 is controlled by the NEGATIVE pole. I understand that a lot of cars use this same technique. So the closer the negative on the motor is to a short circuit (0 volts), the faster the motor runs. Keep that in mind.

What happens when the blower motor does not come on?

As a note, 85 percent of the time when the blower motor does not come on or operates at one speed only, the blower motor resister is at fault. The resister emits substantial heat from the resistance it supplies and eventually burns up. The resister is inexpensive as parts go and is simple to replace.

How long does it take to replace a Mercedes blower motor?

There is a motor and relay below the motor that many folks replace at the same time, since both are known to fail. One form member even has an excellent write up about the replacement, including pics. Very helpful! It’s about a 2-3 hour job, less if you’ve done one before. Thanks guys, I’ll look again. Must have missed it first time round

Why does my Mercedes Benz blower stop working?

Im from Malaysia… i just want to ask why my blower stop working after i charge the gas in the system. like it suddenly stop. is it because its a burden to the blower? and..the compressor didnt stop eventhough i released all the gas. maybe there’s problem at the controller. but whats the reason this happen? sorry my english kinda suck. Hi.

What to do if your blower motor stops working?

Personally, I replaced mine when it stopped working and that solved the problem. There is a motor and relay below the motor that many folks replace at the same time, since both are known to fail. One form member even has an excellent write up about the replacement, including pics.

How to replace Mercedes Sprinter blower motor resistor?

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What happens when a blower motor relay wears out?

Without it, the AC system will not be able to circulate any heated or cooled air. The blower motor relay controls the current used to power the blower motor, and is subject to the constant on and off switching. Over time, it can eventually wear out.

Where is the blower control switch on the dashboard?

The blower control switch on the dashboard controls the circuit flow of the blower motor to adjust the voltage from low, to medium, to medium-high, to high. When on high, the circuit bypasses the blower resistor.

How do you remove a Mercedes blower motor?

Gently pull down on the tab on the side of the blower motor. With the tab pulled down turn the motor clockwise and wiggle and pull it down and out of the housing. Here is what removal tools i use :

Why does my Mercedes air conditioner keep blowing hot air?

In many models, the AC keeps blowing hot air even after recharging the coolant. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. A Mercedes air conditioning reset is a possible solution. Do you know how to do it? Is there any other way to fix the glitch?

Why does my Mercedes E320 AC not reset?

For example, if you want to know about Mercedes E320 AC reset, it is better to check the manual and follow the manufacturer’s recommendations. If a Mercedes air condition reset does not work, these following reasons could be causing the trouble: When the AC is releasing hot air, the possible reason could be a defect in the damper.

What to do if your Mercedes AC unit stops working?

Be aware that if you reset the unit and it again stops working, you need to take the vehicle in to the dealership for repairs. Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position. This is as far as the cylinder will go without cranking the engine.

What is the recirculated air button on a Mercedes?

This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously. The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it.

What kind of engine does a Mercedes Benz 380SL have?

Compare Mercedes Benz Series 107 Models Model Years # Built Engine BHP 280SL 1974-1985 25,500 2746cc I6 185 280SLC 1974-1981 10,700 2746cc I6 185 300SL 1985-1989 N/A 2962cc I6 188

What causes a blower motor to stop working?

In a situation where the motor doesn’t work on any speed, the most likely causes are: a blown power supply fuse, a bad motor ground connection, bad motor speed control module or a failed motor. On all systems, a failed blower motor is least likely. Blower motors generally don’t fail out of the clear blue.

How do you fix a blower motor on a car?

Disconnect the electrical connector at the blower motor and jumper power and ground to the motor, bypassing all the speeds controls. Run a fused jumper from the battery to the power side of the motor and connect a temporary grounding jumper to the other motor terminal.

Why does my Mercedes-Benz A / C blower run uncontrolled?

But under fault conditions it could fail as ‘always on’ or ‘never on’. Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same.

What to do if your Mercedes AC unit is not working?

However, there might not be any damage in the AC unit when it is blowing warm air or not running properly. It could be a temporary fault and a reset is likely to be enough to restore the normal function. Sometimes, the process is called a Mercedes climate control reset. The reset procedure is similar no matter whatever you call it.

Why is my blower motor relay not working?

When the blower motor does not respond at all, it may not be due to mechanical failure within the motor itself. Since the relay supplies the current that makes the motor move, a nonresponsive motor may be the result of a worn out relay.

What to do if your heater fan relay is not working?

Put everything back together the way it came and re-program the code into the radio if needed. If you’ve checked the fuse panel, and the fan motor doesn’t run at all, or if it runs only on the lower speeds, the blower motor relay may be at fault. Relays are used to carry electrical loads that are too large for conventional switches.

What’s the difference between blower relay and AC relay?

If it says blower relay, you’re golden; if it says AC relay, you might have what you want. If it says cooling fan relay, it’s talking about the relay that controls the radiator fans. Some cars have something called a power relay or an “unloader” relay. These relays power the blower fan as well as some other accessories.

When to replace a heater blower motor switch or relay?

When the motor gets old and tired it will draw more current through the wires than a new motor. It may still draw enough current to blow the fuse after it runs for a while. In that case, a motor replacement is in order. Step 1: Disconnect the battery. Put on your safety glasses and disconnect the battery at the negative cable.

What happens when you change the fuse on a heater blower?

If the fuse is blown, replace it and then try the blower. If the fuse blows right away, your car may have a bad blower motor or some other problem in the system. If the blower works when you change the fuse, you may not be out of the woods yet. When the motor gets old and tired it will draw more current through the wires than a new motor.

When to suspect a Mercedes Benz blower motor is failing?

The blower final stage unit can fail resulting in a malfunctioning or inoperative blower motor. If you suspect your final stage is failing, look for the following symptoms: Blower motor speed fluctuates from high to low.

How does a Mercedes Benz blower motor work?

That is the design. The blower motor (A32m1) is powered from circuit 30, which is the unswitched battery voltage, via fuse f25 (30A). I second the above posts.

What to do if your Mercedes Benz fan is stuck?

Not hard to do, just drop the blower motor and replace the regulator. The hardest part is positioning your self under the dash and looking upwards to locate the mounting screws. Hi Paul, just wondering if you found a solution to your stuck fan.

What causes the a / C blower to run uncontrolled?

Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same. Still the Regulator?

What do you need to change engine mount on Mercedes Benz?

You will need a set of sockets and a metirc wrench set to complete this repair which you most likely already have. One tool that you don’t have which is a must for this job is the Mercedes Benz Offset Engine Mount Wrench 16mm. You could technically remove the bolt without this tool but it is much more difficult.

Where are the bearings on an AC fan?

All motors, including alternating current (AC) fan motors, have bearings fitted between the armature and the motor housing. The bearings allow the armature to rotate freely without causing friction.

Do you need a screwdriver to replace bearings on a fan?

It’s likely you’ll only need a screwdriver to replace motor bearings. All motors, including alternating current (AC) fan motors, have bearings fitted between the armature and the motor housing. The bearings allow the armature to rotate freely without causing friction.

How to test a blower motor resistor in the garage?

Look for obvious signs of corrosion and burns from overheating. If you want to do a quick test of the blower resistor, you can check the resistance of each of the resistors with a multimeter as follows: set the tool to read ohms (a measurement of resistance) and connect one of its probes to the common output terminal of the resistor.

Why is my blower motor resistor not working?

If there is power indicated on high blower speed, but not low or mid range, the problem is the blower resistor. Test for ground at the blower motor if there is power indicated at all ranges, but the motor does not function.

How do you troubleshoot a blower motor resistor?

This can be annoying, but troubleshooting is easy. If you start at the blower motor, and check resistance in the circuit, you will find the problem in no time. Power supplied from the fuse panel passes through the switch to the blower resistor assembly.

Can a broken motor switch stop a blower?

A broken blower motor switch can also stop the blower from changing to certain speed settings. If your blower motor cannot change to certain speeds, check both the resistor and the switch on your dashboard. The most common failure points are the resistor and the motor itself.

Why does my blower motor run when the car is off?

Blower Motor runs when car is off! Long story short – it was the blower fan regulator. For future reference, don’t buy a cheap off brand replacement unit, it may be defective.

How do you replace a blower motor in a car?

Reinstall the motor into the climate control unit. Once it’s secure, reconnect the wires. Now, reconnect the negative battery terminal and start your vehicle to check the function of your new motor. Reattach the cover under the dash. Replace the floor mat.

Where is the blower motor on a Mercedes Benz?

The motor can be seen hanging down close to the passenger kick panel. Just to the left of the blower motor, an electrical connector connected to a flat 1-inch-by-2-inch plate can be seen. This is the blower motor resister, which controls the fan speeds. Disconnect the multi-wire connector from the blower motor resister next to the blower motor.

What should I do if my blower fan is not turning?

Repair the connector. If the motor still does not turn, the motor is bad. Replace the motor. Test the switch. Plug the connector back in to the blower motor, and then trace the wire harness back to the connector closest to the blower motor switch, usually located under the dash. Disconnect the connector and set the multimeter to ohms.

How much does it cost to replace blower motor on Mercedes E320?

A malfunctioning HVAC blower motor regulator can cause the blower motor to operate below the requested speed or not at all. Updated regulators are available; the blower motor and cover need to be replaced at the same time to upgrade the system. The average cost for a Mercedes-Benz E320 Blower Motor Replacement is between $727 -$748.

How does a blower fan work with a defroster?

When the coolant reaches a certain temperature, it will open the thermostat. Hot water will move through the core of the heater while the blower fan pushes the warm air through the vents of the defroster to warm up the windows.

Why does my C280 blow air from the vents?

My C280 seems to have developed a bad actuator motor MB calls it a stepper motor in the plumbing vent work. All air blows from defrost and side vents.

What does it mean when your radiator fan is not working?

This is what we call a blown fuse. A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan.

Why is the liftgate not working on my Mercedes ML350?

If you manually close the tailgate, will the latch lock and pull the tailgate tighter? A bit of history. Shortly after I bought the vehicle, the liftgate stopped working. When I would push the remote lift button, it would disengage the latch but not lift. Then the latch would re-engage and shut tight.

What to do if your Mercedes heater fan is not working?

Look at the 30A inline strip fuse (pop the cover fm holder), drivers side near hood alarm switch and strut mount. Mine just failed a few days ago, cracked in half fm fatigue. The fan speed controller is hooked up to the speed sensor in your speedometer.

What causes a heater fan to stop working?

What else would stop working if the OVP is bad or what else causes the heater fan to not work. Its too cold now to use the car without heat. Assuming all your fuses are good, either the blower motor is toast or the blower motor regulator has gone. There is a nice R/R link for the blower motor in the DIY section.

What should the voltage be on a Mercedes blower fan?

Follow them to a terminal block located on the firewall near the power brake vacuum booster. One should be ground/earth. One should have +12V. The last one should have around +6V; the exact voltage will vary depending on the fan switch setting. If any of these are wrong, check for connection problems.

Why is my fan speed controller not working?

Mine just failed a few days ago, cracked in half fm fatigue. The fan speed controller is hooked up to the speed sensor in your speedometer. If you are getting air movement at hwy speed but no fan at idle I would suspect that the speed controller is likely faulty.

Why does my AC blower run with the key out?

In the meantime, pull the fuse. It is the heater/AC blower. It continues to run with the key out of the ignition. And I checked the radio as well, that does not appear to work with the key out.

Why does my car blower motor not shut off?

If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.

Why is my Mercedes-Benz E320 AC not working?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Mercedes-Benz E320 has air conditioning problems?

Why did my Mercedes-Benz C320 2001 break down?

My c320 2001 with 97k broke down. On Saturday i jumped in to the car as usual started the engine and brake faults appeared. I was suprised and switched engine off for restart having hope it will disappear.

Why is my C320 no crank and electric issues?

P2037 no or incorrect CAN message from control unit N15/3 ETC (EGS) communication fault. I was advised to check maxi fuses and front SAM fuses 52 53 54 and starter relay. All is fine and also i replaced all maxi fused. Only 60a yellow (position f6) looked overburned.

What should I do if my blower motor is not working?

If it’s good, refer to a wiring diagram for your vehicle and conduct these tests: Disconnect the electrical connector at the blower motor and jumper power and ground to the motor, bypassing all the speeds controls.

What are the symptoms of a failed blower motor resistor?

Blower motor resistor problems. Problems with a blower motor resistor are common in many cars. The most common symptom of a failed blower motor resistor is when the heater fan only runs at high speed and doesn’t work at low speeds.

When do you need to replace the blower motor relay?

If the blower motor does not function, car fuses are blown, or relays are melting, you may have to replace the car blower motor relay. 1. Blower motor does not function 2. Blown fuses 3. Melted relay The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor.

Do you need to replace the blower motor?

Congratulations on your successful results Frank, good thing you did not need to replace the complete blower motor assembly. I replaced mine with the heat sink (probably unneccesary, but I didn’t see the relay sold separately at the time).

Where can I buy a blower motor resistor?

I haave ordered the resistor from ebay for $32.00, however, once I removed the microfilter, I tried the fan and it responded to the different speed inputs in both econo and auto. The microfilter appears to be clean, shined flash light both ways. I will try a new filter to see if makes any difference.

Is the blower motor on my 2003 s 500 working?

I have a 2003 S 500 with approx 157,000 miles. The blower motor works some times and not all of the time as of late. For example, no blower going until I travel about 20 minutes and more as of late no blower going at all.

What to do if heater blower won’t run?

If you have a 108, 109, 114 or 115 chassis you will have to remove the center console and dash to get to the motor. If you have a 107, 116, 123 or 126 Chassis access to the motor is quick. For the 201 and 124 chassis it takes a little more work as you have to remove the wiper and intake air vent assembly.

Can you replace the blower motor on a Mercedes Benz W124?

The blower motor on the W124 is not quick or easy to replace but if you follow the instructions here it can be done, and you can save yourself a lot of money. You will need to remove the mono-post wiper and motor before you can remove the blower motor. Please see our article on mono-post wiper motor replacement for additional assistance.

How are the wires connected to a blower motor?

When all the clips are loose the top of the air box will lift off (red arrow). The blower motor has two electrical connections and both wires are color coded for ease of installation (red arrow). Separate the wiring connections noting the wiring runs below the motor. The motor is held in place by a single metal clip.

How to replace the blower motor resistor on a Mercedes Benz?

Use a T20 Torx and remove the three screws holding it in place (red arrows) and pivot it down at the front. Disconnect the electrical connection for the footwell light (red arrow).

How to replace a Mercedes Sprinter motor resistor?

Replace Mercedes Sprinter Blower Motor Resistor – YouTube If this video was helpful to you please Subscribe!!!!!!!!Replace Mercedes Sprinter Blower Motor Resistor Check my other video out on removing the glove box

Why is my blower motor resistor going bad?

The blower motor and resistor move the air through the HVAC system. If your motor starts to run at odd speeds all by itself or will only run at slow or flat-out there is a good chance the blower motor resistor is going bad. Changing out the resistor is easy and can be accomplished in under an hour even the first time you do it.

How do you change the blower motor on a BMW?

Blower motor only runs at one speed. The blower motor resistor is mounted to the blower motor. You can change it by removing the lower foot trim on passenger side of vehicle, or for even easier access, remove the glove box. In this tech article I will highlight how to replace the blower motor and the blower motor resistor separately.

How does the final stage of the blower motor work?

The blower motor resistor (final stage) is utilized to control blower motor speed. It receives the driver demand signal from the HVAC control panel and sends a high current signal to control blower motor speed. The blower final stage unit can fail resulting in a malfunctioning or inoperative blower motor.

Is the blower motor controlled by the negative pole?

And REMEMBER – there is power to the motor even when the switch is OFF. The blower motor on a 140 is controlled by the NEGATIVE pole. I understand that a lot of cars use this same technique. So the closer the negative on the motor is to a short circuit (0 volts), the faster the motor runs.

How long does it take to replace a blower fan?

The problem is usually the blower motor regulator. The regulator controls the fan speed of the blower motor and can fail after many years of use. Thankfully, replacing the blower motor regulator is an easy fix, usually taking no more than an hour. In this article we will also cover the steps involved with removing the blower fan itself.

What to do if your Mercedes heater blower is not working?

My blower motor was fixed in with 3 posidrive screws. Had to use a stubby screwdriver on one of them too due to a serious lack of room. Check first before just pulling it out Rooty.

Where is the fan on a 1999 V220 Ambiente?

Click to expand… I have a 1999 V220 Ambiente with same problem, fan sometimes works and comes on over speed bumps. I have located the motor, visible behind left hand dash vent, but can’t get at it to remove. Even when working it’s not powerful so needs replacing or new brushes, just need to remove it.

Why is my Mercedes-Benz E320 heater not working?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My Heater Working? What are common reasons my Mercedes-Benz E320 has heater problems?

Why is my C230 Komp heater not working?

C230 Komp blower has been off and on since last year, and only working on 5 when it did. Worked fine over summer. Now that it is cold, it stopped for the most part. Read the threads here….pulled cover off from under passenger foot well and access the blower motor and wiring. Wiggled wires and checked connections and that did the trick.

Where is the Mercedes heater blower located in the car?

Check first before just pulling it out Rooty. Once you remove the trim under the dashboard/footwell area, it is located up underneath/rear of the glovebox. I bought a new one when mine died. £88 delivered from Merc dealer inc VAT.

How long does a car heater blower stay on?

The blower is supposed to stay on for a few minutes after the car is off. Look in your owners manual. I think it’s primarily for cold weather, it keeps the car interior warm until the heater core completely cools down. Not to say you don’t still have a problem separate from that.

Why is my Mercedes Benz cooling fan not working?

Over time, the control module in your cooling fan can fail, causing your fan to either run itself too high or not at all. This could be potentially catastrophic, resulting in an overheated engine. If you catch your cooling fan acting up, be sure to replace it with a quality part as soon as possible to prevent further damage.

What to do if your heater motor won’t work?

Options for repairing it yourself and saving big $$$. If your heater motor won’t come on, first check your fuse or relay. If you are not sure if the switches are the problem, we recommend you get the covers off and power the motor directly with a 12 volt power source.

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Mercedes-Benz E320 has air conditioning problems?

Where are the fuses located on an e320?

You can also see a list of all the fuses, their designation and layout. The fuse boxes shown below are apply to 1996 1997 1998 1999 2000 2001 2002, models E320 E420 E430 E55 AMG. The main fuse box is located on the left side in the engine compartment near the windshield. Here is a layout of the fuses in the main fuse box.

What causes a fuse to blow on a blower motor?

If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.

What causes a bad or failing blower motor relay?

Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…

What happens if you have a bad blower motor?

The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. Without it, the AC system will not be able to circulate any heated or cooled air.

Why is my Mercedes-Benz heater fan not turning on?

The last one should have around +6V; the exact voltage will vary depending on the fan switch setting. If any of these are wrong, check for connection problems. If the control voltage never appears, the regulator will never turn on the fan. This control voltage is coming from the climate control unit on the dash.

How to troubleshoot your Mercedes Benz air conditioner?

Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on.

How to reset a Mercedes air conditioning system from Japan?

To be on the safe side, hold them until their LED lights start flashing. Step 3: Wait for about a minute for the LED lights to stop flashing. When they do, turn the car off. Wait one more minute before restarting the engine. The AC system is reset now and the hot air blowing problem is likely to be solved.

What do you call a Mercedes climate control reset?

Sometimes, the process is called a Mercedes climate control reset. The reset procedure is similar no matter whatever you call it. However, if the AC shows any trouble after resetting, you have to take it to a servicing shop or the dealership for a permanent fix.

Is it bad to replace vacuum line on Mercedes 300D?

The vacuum lines become old and brittle with age and can cause all sorts of gremlins from door locks to engine shut off. Fortunately the vacuum system is (relatively) easy to diagnose and repair. Vacuum lines, elbows and T’s are easy to replace. Even if the vacuum pump is worn out, it’s not a bad repair.

When did the Mercedes W123 chassis come out?

Mercedes W123 Repair. The W123 chassis covers 240D’s, 300D’s, 300TD’s, 280E’s, and several other models of Mercedes coupes, sedans and wagons from model years 1977 to 1985.

What kind of heater does a Mercedes 124 have?

For all Mercedes 124 chassis cars from 1986 up to 1993 ONLY. This includes the 260E, 300E, 300D, 300CE, 300TE, and 400E Fits all Mercedes 126 chassis cars from 1981 to 1991. This includes the 300SD, 380SE, 380SEL, 500SE, 500SEL, 300SDL, 420SEL, 560SEL, 300SE, 300SEL, 380SEC, 500SEC, 560SEC.

How much does a blower motor regulator cost?

The cost is $640 (R4800) from MB dealer. From a second hand dealer it is $120 for just the regulator that fits the newer blower. I decided that it was too risky, firstly to spend so much on a regulator and blower to which has already failed three times in the past 8 years.

Why is my Mercedes air conditioner blowing hot air?

Another benefit of preventive maintenance is that in the harsher months of summer, when the weather is extremely hot, new problems can arise with your Mercedes, or any vehicle for that matter.

How to troubleshoot your Mercedes medic air conditioner?

Turn the A/C ON. If you have an Economy button make sure that is off. Make sure fan is on HIGH, temperature selector is turned all the way to COLD, and that the A/C and recirculate light indicators are on. Set the temperature to cold, the lowest setting. Set the cooling fans on high on the climate control.

How does Mercedes Benz air conditioner system work?

While the pictures on this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. How the A/C System Works. A/C compressor not engaging.

How do you defrost a Mercedes Benz without cranking the engine?

Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position. This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously.

What should I do if my Mercedes engine stops working?

How is the speed of the blower motor controlled?

On climate control systems without automatic temperature controls, the blower motor speeds are controlled by a switch wired to a stepped resistor that usually includes a thermal fuse.

How to test a Mercedes Benz fan blower motor regulator?

This is the blower motor resister, which controls the fan speeds. Disconnect the multi-wire connector from the blower motor resister next to the blower motor. Start the car and turn the air conditioning on. Test the connector for power at the terminals in the connector using the voltmeter. If there is power, reinstall the connector to the resister.

Where is the fuse on a blower motor?

Locate the fuse for the blower motor in the owners/service manual. Test the fuse, with the ignition key on, using the 12-volt test light.

What causes a blower motor to stop running?

Most blower motors ground through the case of the motor when it is screwed into place or by a small ground strap from the case to the body of the car. Over time, the ground connection can become corroded or loose, causing the motor to function intermittently. Lee Sallings is a freelance writer from Fort Worth, Texas.

Why does my Mercedes E320 fan not shut off?

Mercedes-Benz E320 The fan motor wont shut off when ignition… The fan motor won’t shut… The fan motor won’t shut off when ignition is turned off Show More Show Less Ask Your Own Mercedes Question Share this conversation Answered in 2 minutes by: 10/14/2011 Mercedes Mechanic: Marty, Mercedes Technician replied 9 years ago

Why does my car fan keep running after I Turn Off the engine?

Running cooling fans help cool down the engine even after you turn off the car. Common Causes. If your cooling fan runs for over 10 minutes after turning off the engine, you may have a problem that needs to be fixed. Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor,

Where is the motor for the heater blower located?

The motor that turns the blower is called the blower motor. It is located in the dashboard, usually on the opposite side of the steering wheel or inside the engine compartment on the firewall. The blower speed can be adjusted in almost every modern car.

Where is the blower motor resistor located on a car?

It’s located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.

Where does the ground go in a Honda blower motor?

The blower motor control module (Honda calls it Power Transistor) supplies the ground. The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor.

How to replace a Mercedes Benz W203 electric fan?

In front of the radiator you will find the horns. Remove the four electrical contacts for the two horns and using a 10mm socket remove the horns from the center bracket. Cut the zip tie that holds the horn wiring harness to the center bracket on the cross member. Remove the 10mm bolt that holds the power steering line to the center bracket.

Can a blower assembly be removed from an air handler?

But that’s not the case with the blower assembly in the air handler. Not only does blower assembly removal permit more thorough cleaning of all of its parts, that approach avoids dripping messy goop into the bottom of the air handler into areas where it is impossible to clean without removing the whole fan assembly.

Can a dirty blower fan cause an air conditioner to fail?

If a cooling coil is installed above the air handler then the same system may be in use for both air conditioning and heating. that a dirty blower fan reduces the blower assembly air flow rate, increasing heating and cooling costs, and sometimes leading to actual system operating failures such

Where is the starter motor relay fuse box?

Starter motor relay Fuse box in passenger compartment Mercedes w203. fuse box location. The main fuse box is located in the passenger compartment on the driver’s side of the cockpit. Opening fuse box Open the driver’s door. Pull fuse box cover “1” open with a screw driver or similar tool (see arrow). Remove fuse box cover “1” rearward.

Where is the fuse box in the Mercedes W203?

Fuse box in passenger compartment Mercedes w203. fuse box location. The main fuse box is located in the passenger compartment on the driver’s side of the cockpit. Opening fuse box. Open the driver’s door.

Is there a problem with my Mercedes blower?

There may be a problem there- or–the fan may be jamming but the motor still turning difficult to say. Perhaps putting the car on the Mercedes star diagnostic system might help. However if the the problem is purely mechanical then it may not show up on the diagnostic. There is still air coming through the vents, although only just.

What’s the problem with my W204 air blower?

I have been having intermittent problems with the blower, it normally works fine after starting the car, but after 10 mins or so of blowing hot or cold air at full speed, it still makes noise but there is very little air coming through the vents. Any ideas what it could be / is this an easy DIY job? Thanks in advance!

What should I do if my Mercedes C class fuse is blown?

Auto fuses are marked and color coded (Figure 3). The two common sizes (regular ATC and mini ATM) are available at auto parts stores. Use the fuse puller to remove fuses without damage. Don’t use pliers! To check a fuse, simply look at the U-shaped connector. If the connector is melted through, the fuse is blown. Figure 3.

Is there a problem with my W204 c250 blower?

I have a similar issue with the blower of my 2012 W204 C250 CDI. Its like the blower has a mind on its own and starts or stops randomly, no matter if I have the climate control on manual or auto. Windshield defog setting is affected too.

Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car. Be aware that if you reset the unit and it again stops working, you need to take the vehicle in to the dealership for repairs. Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position.

How to remove the climate control unit from a Mercedes 500SL?

How can the climate control unit from a 500SL (1992 model) be removed? To remove the Mercedes climate control on the 500 SL, first the radio should be removed. There are two locking lugs which lock the climate control unit in position. These should be pried out to allow the climate control to slide forward.

Why is my a / C blower not blowing?

A metal that when it corrodes, it turns white, and unlike copper, aluminum corrosion does not conduct electricity at all and causes resistance issues and can cause overheating of a circuit. Took out a common finger nail Emory board and went to work, both sides of each contact, then used a small brass brush on each side and along the tips.

What happens if you lose the blower motor relay?

Blower Motor Resistor. Blower Motor Resistor. What is a blower motor resistor and where is it located? The blower motor resistor, also commonly referred to as an A/C blower motor resistor or a heater blower motor resistor, is an important component to your vehicle’s heating, ventilation, air conditioning (HVAC) system.

Why is my Mercedes Benz heater not working?

Its too cold now to use the car without heat. Assuming all your fuses are good, either the blower motor is toast or the blower motor regulator has gone. There is a nice R/R link for the blower motor in the DIY section. The regulator lives under the blower motor. Your OVP has no play in the blower motor operation.

Why is my heater blower fan not working?

Assuming all your fuses are good, either the blower motor is toast or the blower motor regulator has gone. There is a nice R/R link for the blower motor in the DIY section. The regulator lives under the blower motor. Your OVP has no play in the blower motor operation. Click to expand… Can anyone direct me to links for more information?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My Heater Working? What are common reasons my Mercedes-Benz E320 has heater problems?

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