Why is my air conditioning not working on my Mercedes S500?

What are common reasons my Mercedes-Benz S500 has air conditioning problems? While there are a variety of reasons your Mercedes-Benz S500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

What to do if there is no power to the air suspension pump?

If there is no power going to the air suspension compressor, check the air suspension fuse and relay. Here is a picture that shows no power to the air suspension pump. The next step would be to use a professional diagnostic scanner such as the iCarsoft MB II to check the fault codes for the Air Suspension Control Unit.

How can I tell if my air suspension compressor is failing?

Most suspension systems are self-regulated and will automatically turn the compressor on and off according to the system’s requirements. The suspension system cannot function without it. If the compressor is failing to come on at all, then that is a sign that it has either failed or it is having an issue.

What causes a Mercedes Benz air suspension to fail?

Faulty relay or Blown Fuse The air suspension compressor relay is known to fail. It could either not engage the air suspension compressor at all or even worse keep it engaged for longer that required. If the air suspension compressor is kept engaged for too long, it can get damaged.

What happens if the air suspension compressor fails?

Air suspension compressor Failed (Easy DIY repair, Average cost $200) The air suspension compressor does just that, generates compressed air. It fills up all the air struts, and it can fail. They either seize up, fail to produce the required pressure or the brushes inside them wear out.

Where is the fuse for the air suspension compressor?

Also, check the fuse for the air suspension compressor. On the Mercedes-Benz S-Class, the fuse box that contains the air suspension compressor relay and fuse are located on the right (passenger side) of the engine. Look at the 40 AMP fuse F32, make sure that it is not blown.

Where does the water drain in a Mercedes Benz?

Find where it drains down in the rear by pouring water in the track. Then run the snaking device from the bottom to the top. Keep pouring water in the track until it runs clear. I’ll see your suggestion and raise you a connected pipe. Found the problem by removing the rear quarter pillar/tailgate cover and dropping the roof lining a little.

Why is my Mercedes’s Class W220 not charging?

Only gas should go into the AC system. If you turn the can upside down the AC system will get liquid refrigerant which can cause the AC compressor to lock up and also wash out the oil. Keep the AC refrigerant can in the up position and only shake it slightly while charging. If the refrigerant level is very low, the AC compressor will not engage.

Is there a water leak in the back of the Mercedes-Benz ML 320?

But the 2004 VW T-reg we have hasn’t given us one single problem at 150k miles. The ML 320 at 95k is one thing after another. Any idea’s where the rear drain hole is?

How to unclog your car AC drain line?

The sloshing noise may be especially noticeable when making turns as well as having a damp floorboard. Here is a quick fix using compressed air to unclog a Mitsubishi Galant AC drain line but fix can be used for many other vehicle models. Loading…

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.

What to do if your Mercedes AC does not reset?

The AC system is reset now and the hot air blowing problem is likely to be solved. If your Mercedes car does not respond to this procedure, you should check the owner’s manual. 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.

How to troubleshoot Mercedes Benz air suspension problems?

Learn how to troubleshoot Mercedes-Benz Air Suspension Problems. You decide to buy a Mercedes-Benz, maybe an S-Class, CLS-Class, R-Class, CL-Class or E-Class. One day you hear of other Mercedes-Benz owners having suspension problems. The next day you start having air suspension problems yourself.

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.

What happens when you charge the AC in a Mercedes?

Keep the AC refrigerant can in the up position and only shake it slightly while charging. If the refrigerant level is very low, the AC compressor will not engage. Charge the AC system for a couple of minutes with the engine running, and you should notice the AC compressor engage / kick in once you add enough refrigerant into the system.

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.

What should I do if my Mercedes Benz won’t start?

Start the car and you should be able to get around 60 psi. When the engine is running and when you turn off the engine the pressure should stay steady. Always perform this test on a cold engine. Next, make sure that the fuel injector connections are secure and not loose. Check the fuel pump and the fuel pump relay.

Can a Mercedes Benz start in cold weather?

Must crank a few times, sometimes start, engine dies down. After it can start, car runs well. Battery in good condition. Warm weather no problems starting even after car not used in 2 or 3 weeks. What do you think is likely cause ?

What happens when you start a car in cold weather?

When you start the car, you will notice that it idles high for a period of time until the engine warms up. This is the enrichment cold start process. This is done with what is called a cold start injector which injects more fuel into the motor until the engine reaches a specific operating temperature.

What do I need to troubleshoot my Mercedes Benz air conditioner?

You will need a Recharge Kit which you can purchase at the local auto parts store. The kit includes a gauge that you can use to test your A/C system initially. Second, is to turn the A/C On. If you have an Economy button, make sure that is off.

What causes a Mercedes Benz air conditioner to blow a fuse?

Finally, check the clutch itself to make sure it is not defective. If there is voltage going to the clutch, a fuse may be blown. A blown fuse would indicate that the system may not have enough refrigerant pressure to tip the low-pressure cutoff switch that cycles the compressor.

How do you reset the AC system on a Mercedes?

Hold these buttons down for about five to 10 seconds, or until the LED lights on both buttons start flashing. Wait 45 to 60 seconds for the LED lights to stop flashing. Then turn off the car. Wait 60 seconds and then start the car engine again.

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.

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 happens when the blower fails on a Chevy Equinox?

When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will be dramatically decreased. This Read More When the heater control valve fails, adjusting the temperature may not change the air temperature at the vents, whether hot or cold.

Why is my Mercedes-Benz S500 heater not working?

What are common reasons my Mercedes-Benz S500 has heater problems? While there are a variety of reasons your Mercedes-Benz S500 heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

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.

Why does my AC blow hot air but not cold air?

The reading for this sensor… sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. The problem I have is that ac blows hot/warm/outside temp air initially, then it blows cold air for 1 or 2 min then it blows outside air.

Is the heater blower on my car not working?

Heater Blower Not Working!!!! Hi guys, i’m sure this has been posted before but couldn’t find it when i just searched so sorry if it has!

How to add Freon to your AC system?

How to add freon to ac system. Compressor clutch not engaging (chevy silverado) – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.

Why is my Mercedes W220 blowing hot air?

If the refrigernat level in the system gets too low which is common problem on older cars, the Air Conditioner Control Unit shuts off the A/C to protect it from getting damaged. In many cases refilling your car with refrigernat will fix A/C blowing hot air problem.

Why is the Freon low on my AC compressor?

The low-pressure switch will prevent the AC clutch from being engaged, and the compressor will not spin. This prevents the compressor from engaging. The major reason the Freon is low would be due to leakage. Once you refill the Freon, check for any leakages to prevent the problem from reoccurring.

Why is the AC clutch not engaged when the Freon is low?

No, the AC clutch will not engage when the Freon is empty or low. The low-pressure switch will prevent the AC clutch from being engaged, and the compressor will not spin. This prevents the compressor from engaging. The major reason the Freon is low would be due to leakage.

What does it mean when your AC compressor does not spin?

It is an ominous sign when the clutch engages but the compressor does not spin. Changing the compressor clutch could be the only solution in this case. A bad AC compressor clutch needs immediate fixing. A delay can cause serious damage to the air conditioning system and the engine.

Why is my a / C compressor not working on my Mercedes?

One other reason why the A/C compressor does not engage is the fact that the system may be low on R134 refrigerant. Typically older cars may have very slow leaks that may require top off with refrigerant every couple of years. You can use a R134a recharge kit to recharge your system if the A/C compressor is not working.

What happens when a pressure switch fails on an AC compressor?

3. Compressor not coming on. As the pressure switches control the on/off function of the AC compressor, a switch failure can prevent the AC compressor from functioning at all. The compressor is what pumps refrigerant through the entire system. If it is not functioning, then the system can not operate, and will be unable to produce cold air.

When does the a / C compressor start to work?

Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley. The serpentine belt rides the A/C compressor pulley every time the engine runs, but the A/C compressor is working only when the A/C clutch engages it.

Why does my a / C CLUTCH not spin when I Turn on the AC?

The center part on the pulley of the A/C compressor will not spin when you have the air conditioner off or if there is a problem. Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley.

What to do if your Mercedes heater is not working?

you can take the fan motor out, easily, its 3 screws and visible if you pull the left hand vent (next to the door) out… grip by top and bottom edge NOT the vents themselves. beside the main unit, under the central console, are the actuator solenoids for air control.

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.

What does a / C compressor do in Mercedes Benz?

Being the heart of the entire system, the A/C compressor’s role is to add pressure by taking the refrigerant and compressing it. Thus, it is important to understand how to check if the A/C compressor is engaging or not so as to avoid exorbitant fees for Mercedes Benz repair Laguna Niguel. First, we make sure we have the right tools.

Why does my Mercedes Benz air conditioner keep flashing red?

But the W211 AC compressor is running continuously (no clutch), it the car runs out of refrigerant, compressor lubrication would also become compromised. Better to take care of the issue soon. Sad story, I had similar problem 2 weeks ago.

How to troubleshoot a / C compressor clutch problems on your Mercedes?

This video is helpful if you are trying to troubleshoot air conditioner problems, the A/C compressor clutch in particular. This opens in a new window. Start by turning the engine on. Set the AC to maximum cold setting. Open the hood and look at the serpentine belt to locate the AC compressor.

Where is the air compressor fuse located on a Mercedes Benz?

For example on the Mercedes-Benz S-Class W220, there is a air compressor relay and fuse 32 on the fuse box located on the passenger side of the engine compartment. Here is a picture that shows where they are located.

What to do if your Mercedes W220 air conditioner is not working?

If the Air Conditioner on your 2000-2006 Mercedes-Benz S-Class W220 is not working, you can try to refill the system with R134a refrigenrant. If the refrigernat level in the system gets too low which is common problem on older cars, the Air Conditioner Control Unit shuts off the A/C to protect it from getting damaged.

Why is there no air coming out of my a / C unit?

There is no air coming out when its on. The A/C unit kicks on but nothing blows out, even when switched to heat. It could be your blower motor. Thats a fairly simple fix.

How to fix the air not blowing out?

Thats a fairly simple fix. Turn you ait on after 2 minutes check your compressor and touch and see if the metal lines that look like pipes are cold and have light water if so the nthe compressor is charging (most expensive component for the a.c.). 31 people found this helpful.

How to survive a heat wave without air conditioning?

Avoid alcoholic beverages and caffeine, as both of these substances can act as diuretics and promote dehydration. For a homemade “air conditioning” system, sit in the path of a box fan that is aimed at an open cooler, or pan filled with ice.

What happens when there is no heat in the car?

In this condition, A/C-cold air and outside air work as they should. Problem is noted when heat fails to deliver on cold days/morning/evening when requested by the driver/passenger. Operator selects heat but gets whatever temperature air is outside. The change over valve, controls how much (hot) coolant should go through the heater core.

What to do if your air conditioner has no heat?

When this goes bad, the coolant going to the heater core is blocked, thus not heating up the heater core = no heat. Get some hoes clamp pliers (I didn’t have one so i used some old pliers that worked with some effort) and disconnect the old Valve/coolant clamps away. **YOU WILL MOST LIKELY BREAK THE OLD VALVE INLETS.

What should I do if my air conditioner is spinning?

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.

What are the most common air conditioner problems?

Common A/C Problems 1 A/C Blowing Warm Air 2 No pressure or low refrigerant levels in the A/C System 3 Compressor Clutch 4 Freon R134a leaks 5 A/C compressor not engaging. 6 Liquid lock of the compressor 7 A/C blowing hot air 8 Compressors switches on then off very quickly.

How to troubleshoot your car’s air conditioner problems?

Check to see that the cooling fans on radiator are running when the air conditioning is on. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. Check the compressor has engaged. Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not.

What are the problems with the Mercedes Airmatic?

The following problems may occur on Mercedes-Benz E, C, CLK, GL, S-Class -You hear air compressor engaging when parked. -Air compressor releases air when parked. -Car lowers overnight, not always. -Mercedes lowers drops on rear or front. When the car is parked the airmatic will try to level the car.

What kind of a / C system does Mercedes SL500 have?

The A/C system in your SL500 consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling.

How to add Freon to a 1998 Mercedes-Benz SL500?

How to add freon to your 1998 Mercedes-Benz SL500: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.

Where did the Mercedes-Benz’s Class’s 500 come from?

No accident or damage reported to CARFAX… 1st owner purchased on 11/20/04 and owne… Last serviced at 139,758 miles in Crysta… 1st owner drove an estimated 8,694 miles… No accident or damage reported to CARFAX…

What kind of car was the 1999 Mercedes Benz S320?

Description: Used 1999 Mercedes-Benz S-Class S320 LWB. When you come to an end of an era, it is common to commemorate or celebrate a great accomplishment. Mercedes was already retooling and setting up production for the all new S class that was to be in production for model year 2000, the W220.

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.

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 causes ABS warning light on Mercedes W204?

This fault can cause the engine to run rough and idle poorly. Common ABS pump and module failure for C-Class W204 range will cause the ABS warning light to illuminate and store fault codes for ‘internal fault’

What causes an ECU fault on a Mercedes a class?

Mercedes A Class ECU & Air Mass/Flow Meter This ECU is a very common fault for the Mercedes A Class, it causes the engine management light to come on and fault code for the Air Mass/Flow Meter to be stored in the ECU’s memory. This fault can cause the engine to run rough and idle poorly.

Why does my Mercedes car flash service lights?

Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car. If the air conditioner unit is not running normally or is only blowing out warm air, it may be a temporary fault.

Why is the ESP light flashing on my Mercedes?

If pressing the ESP switch does not turn off the light, or if the ESP light is flashing, it means there is a problem with the ESP system on your Mercedes-Benz. This article will help you diagnose ESP problems on your Mercedes-Benz. Toggle ESP light on / off by pressing ESP button. Shown on SLK/Crossfire.

Can a steering angle sensor be calibrated to fail?

The steering angle sensor doesn’t usually fail, but they may need calibration. You can use a scanner such as the iCarsoft MB II to read the steering angle sensor values and correct the problem. Before you can turn off the ESP light, you first need to find the cause of the ESP light and fix the problem.

Can a Mercedes-Benz CL class fuse blow?

The S and CL Class have always been Mercedes-Benz flagship vehicles. They always have had the most advanced technologies on them at the time of production and the W220 was no different. They have so many electronics that it is impossible for fuses to blow. Keep in mind that under normal operation of a certain circuit the fuse wouldn’t blow.

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 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

What to do if your AC blower is not working?

Disconnect cables to motor and resistor. Remove hose from motor, it should just pull off with little effort. Unscrew motor and resistor. Screw new motor and resistor in. Connect hose to motor. Connect cables to motor and resistor. Turn on car and test AC. Thanks for watching! Loading…

How can I tell if my AC blower motor is broken?

Air Conditioner Blower Motor Won’t Turn On. If you turn on your air conditioning system and find that there is no air blowing out of the AC unit, or no buzz of the blower fan motor, then it is possible the AC blower motor has an issue. This is one of the most common and easy ways to know if your air conditioner blower motor is broken or not.

How does an air conditioner blower motor work?

As explained in the HVAC Blower Motor Guide, an air conditioner blower motor and assembly is basically the fan inside the air conditioning system that forces the cooled air, via the AC cooling coil, through the vents and into the room space that is being conditioned.

What to do if your Mercedes climate control is not working?

When the control is switched off and on, heating resumes. This could be a Mercedes climate control problem. Replacing the push button assembly or climate control module may help in this situation. Then check the auxiliary water pump to see that it is running and if the heater valve clicks when energized.

How to test the air conditioner in a Mercedes?

Press the AUTO push button. 2) Press REST push button for more than 6 seconds. The display window will alternately show “01” and an in-car temperature of “72 °F”, or “LO” if there is an open circuit, or “HI” if there is a short circuit. 3) By pressing the windshield air distribution push button, the next ascending test step is displayed.

How to defrost an air conditioner in a Mercedes medic?

1) Turn ignition on. Press down arrow push button until “LO” is shown in A/C-heater control panel temperature display window. 2) Within 20 seconds, simultaneously press REST and defrost push buttons for more than 2 seconds.

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