What are the symptoms of a bad heater motor resistor?

Symptoms of a Bad or Failing Heater Blower Motor Resistor. 1 1. Blower motor stuck on one speed. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower 2 2. Blower motor does not work on certain settings. 3 3. No air from the vehicle’s vents.

Why is my blower not working on my GMC Sierra 1500?

The connector that plugs into the blower motor under the glove box became too hot and melted the plastic resulting in the a/c and heat not to work (this includes the windshield defroster).

Why does my GM blower motor resistor keep failing?

In some cases, the heat is so high that it melts the connector. This is common on late model GM vehicles. If you discover a melted connector, do NOT attempt repair. Purchase an upgraded pigtail and splice it into the harness along with a new blower motor resistor.

Are there any problems with my GMC Sierra 1500?

See all problems of the 2004 GMC Sierra 1500 . The contact owns a 2006 GMC sierra. While driving approximately 45 mph, the contact noticed a burning odor. She then noticed that the blower motor on the wiring harness melted, causing the vehicle to smoke.

Is the blower resistor on my GMC Sierra on fire?

This was preformed on a 2004 GMC Sierra with a blower resistor that had been on fire and melted the wiring. Loading…

What’s the problem with my 2004 GMC Sierra?

2004 GMC Sierra 1500: Problem all gauges do not work all went… Customer Question Hello. I have A 2004… Hello. I have A 2004 GMC Sierra 1500 truck. Problem all gauges do not work all went out together. All other electrical work fine and truck runs great. What could the problem be, Thank you, XXXXX XXXXX E-mail:[email protected]

What kind of resistor do I need for a 2003 Chevy Silverado?

Part may not be OEM exact fit for 2003 Chevy Silverado 1500. When searching for a resistor for my vehicle, 2003 Chev Silverado 1500, part numbers 22807122 and 22807123 both listed as replacements.

Why does my GM blower motor not turn on?

In many cases it’s a problem with the GM blower motor module. The most common complaint when this part fails is the motor will not turn on at all. However, it’s also possible for the blower motor to have speed control issues or continue running at all times even with the ignition off.

What kind of blower resistor do GMC pickups use?

NOTE: This tutorial only applies to the 1988 to 1993 vehicles listed in the ‘Applies To:’ box on the right column. Some 1994 Chevy/GMC pickups use this type of blower resistor. For the 1995 and newer blower resistor test, the following tutorial will help:

How to fix a Chevy Express heat fan blower?

– Resistor Replacement, Wire Harness Repair – YouTube Chevy Express Van- Ac/Heat Fan Blower issue Fixed! – Resistor Replacement, Wire Harness Repair 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.

What does the resistor on a heater do?

It is responsible for controlling the blower motor’s fan speed. When fan speed is changed via the knob on the instrument cluster, the blower motor resistor changes setting, which changes the speed of the blower motor.

What should the resistance of a blower motor resistor be?

For example, in this photo we measured the resistance of this blower motor resistor. According to the service manual, it must be around 4-5 ohms. In our case the ohmmeter shows open circuit, which means the resistor has failed. Sometimes, a blower motor resistor might fail due to problems with the blower motor itself.

What happens when a motor resistor is melted?

I pulled the resistor down again, and the connector plug is so melted in there that I can’t get the plug connector out of the resistor. One of the center wires is burned and melted about 1/4 inch outsode the plug. By wiggling that wore I can get speeds one through four to work again, but the wore and plug get really hot.

Where is the resistor on an air conditioner fan?

The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. The resistor is between the power source and the fan, and allows only the desired amount of power to go to the fan.

What causes a blower motor resistor to overheat?

Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor. For example, this happens when the fan blade is jammed by a foreign object or when the motor bearings are worn out and it doesn’t spin freely.

What does the blower motor resistor do in a car?

The blower motor resistor is an electrical component that is a part of the vehicle’s heating and air conditioning system. It is responsible for controlling the blower motor’s fan speed. When fan speed is changed via the knob on the instrument cluster, the blower motor resistor changes setting, which changes the speed of the blower motor.

What does it mean if your blower motor is not working?

Average rating from 849 customers who received a AC is not working Inspection. The blower motor resistor is an electrical component that is a part of the vehicle’s heating and air conditioning system. It is responsible for controlling the blower motor’s fan speed.

How do I Turn Off the blower when the car is off?

Pull ignition key, blower remains off for 2-3 seconds, then starts running at lowest speed. Press “rest” switch – button lights, fan runs at higher speed. Press “rest” switch again – fan stops, then starts again at a lower speed. Something higher up in the power chain is providing power when the ign. switch is off and the fan switch is off.

Why is my Honda CRV heater not working?

While there are a variety of reasons your Honda CR-V 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. Find the most common driver-reported problems that are to blame when a Honda CR-V has heater problems.

What’s the problem with my heater blower motor?

Vent the car and then everthing was working. Not going to make a 2-2/2 drive to the dealer for them to look at it and say nothing is wrong. I think that is when the motor had its first failure. The blower motor has worked for a while but never at speed like when it was new, but has now given up the ghost.

How does a blower motor resistor work in a car?

This is done, so the resistor or a control module is cooled down by passing air. In some older cars, a blower motor resistor was installed on the firewall with the access from under the hood. Problems with a blower motor resistor are common in many cars.

What happens when you replace a blower motor resistor?

In this case, the heater and air conditioning system may still function normally pushing the cold or hot air out of the vent beside the speed. The resistor needs to be replaced with a new one in order to restore its function. Another common symptom of a faulty blower motor resistor is that the blower motor only works at slow-speed.

Where is the Wierd smell coming from the heater?

Go ahead take a piece and sniff it. It is located under the carpet flooring, it is also inside the door casings. The solution for this is to have your dashboard pulled down, remove all the insulators from Ford and replace it all with a different brand of thermal insulator. After this have your interior detailed. Was this answer helpful?

What happens if heater blower motor does not work?

Therefore, if major problems in the heating and air conditioning system fail, as if the power supply to the motor was completely cut off due to overheating or corrosion, the motor will simply not work, which in turn will render the entire heating and air conditioning system unusable, as no air will flow through the vehicle’s air vents. 2.

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…

Why does my electric motor keep overheating?

Contamination of dust and debris will raise the internal temperature of a motor and keep it from cooling, which leads to excessive heat over a longer period of time. This generally occurs without proper maintenance or venting for particles. 4. Start-stop frequency plays a big role in heat damage.

What happens if a heater blower has no power?

A blower motor without power will not be able to produce any air pressure, and as a result the heating and air conditioning system will be left with no air coming from the vents.

What does a melted blower motor relay do?

Melted relay The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems.

What’s the name of the motor that turns the heater?

When the heating or air conditioning in your car is turned on, the fan turns on and forces air out of the car’s vents. The motor that turns the blower is called the blower motor.

What happens when an electric motor overheats?

On-line technologies permit assessment of the entire motor system to facilitate troubleshooting. Maintenance experts agree that excessive heat causes rapid deterioration of motor winding insulation. The common rule states that insulation life is cut in half for every 10 C of additional heat to the windings.

When does it come to motors, how hot is hot?

Temperature control is an important factor in successful motor operation. Care must be taken in the design, application and maintenance of these machines to optimize their performance and life. Having said all that, it is unsafe to place your hand on a motor to see if it is too hot; get a thermometer instead.

Can a warped head cause an engine to overheat?

The warped head alone causes ongoing problems with overheating, and the vehicle may not idle properly. Once an engine gets hot enough for the coolant to boil, a number of events may take place, all of which might mean the end of the engine.

Why does a motor need to be cooled?

Cooling is usually adequate if the auxiliary cooling supplies the same volume of air as the motor’s integral fan. If the driven equipment generates heat (e.g., a compressor) and is contained in the motor enclosure, it can contribute to the temperature rise of the motor.

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.

What happens when a blower motor resistor fails?

The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.

Why is my blower motor stuck on one speed?

Blower motor stuck on one speed A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.

What happens if you lose the blower motor relay?

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. The blower motor relay controls the current used to power the 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 to do if your AC heater fan is not working?

AC/Heater Blower Fan not Working – Motor or Resistor? Quick Fix 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. To avoid this, cancel and sign in to YouTube on your computer.

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.

A blower motor without power will not be able to produce any air pressure, and as a result the heating and air conditioning system will be left with no air coming from the vents.

What happens if the blower motor only works on high speed?

In other designs, the failure of 1 resistor means you lose only one speed. However, most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode.

What should I do if my blower motor resistor keeps failing?

Purchase an upgraded pigtail and splice it into the harness along with a new blower motor resistor. Conduct an amperage draw test at the same time to rule out excessive current draw from the blower motor. Car makers design their HVAC systems to reduce the possibility of debris getting into the system. But they’re not always successful.

Where does the power go in a blower motor?

For each higher speed, power flows through one less resistor. Some car makers run blower motor power through the fan speed switch first, then through the blower motor resistor and then to the blower motor and ground. Other car makers reverse that and run power to the blower motor first and terminate ground at the blower fan speed switch.

Where is the relay on a blower motor?

Correction assuming 97 is same (probably is)… Fan relay is as posted before on top of the duct work left of the resistors you can see both behind the glove box if you take it out. The purple wire comes from the relay/resistors according to fan speed selected.

Where can I get a new blower motor resistor?

I replaced the blower motor resistor and the control unit with new parts from rockauto (ACDelco). I’ve checked the fuse in the dash fuse panel and it is good.

How much does a blower motor cost?

Based on these factors, the costs, including both parts and labor, can range anywhere from $250 to more than $500 for a standard single speed blower motor. If a blower motor is required for a more expensive unit, such as a variable-speed motor, then the costs could be more than $1,000; however, these motors tend to be relatively rare.

Where is the fuse for the heater blower?

The blower motor fuse should be a 30 amp located in the passenger compartment just to the left of where the driver sits, underneath the dash above the left kick panel. It should be marked blower.

What is a car heater blower motor?

Where is the resistor for the blower motor located?

Two individual resistors make up the blower motor resistor assembly on your Chevy pickup. As you’re probably already aware, these resistors are located between the A/C-Heater control panel and the blower motor . The purpose of these resistors is to reduce the amount of the blower motor’s current that’s passing through them.

How to replace a Porsche Cayenne HVAC blower fan?

Move underneath the fan assembly and remove the electrical connection going to the blower fan (arrow). Also remove the five 5.5.mm screws holding the blower fan to the housing. Keep in mind that the screws to the right of the fan will be a little difficult to access due to the location of the wiring harness running down the side of the chassis.

What causes a blower motor resistor to fail?

It’s possible that a blower motor resistor will fail because the blower motor itself has a problem. In cases like this even when you replace the blower motor resistor the blower motor itself may still be struggling and cause the resistor to fail again quickly despite being a new part.

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.

When to replace a heater blower motor resistor?

The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored. 2. Blower motor does not work on certain settings

Why is my blower motor not working properly?

The low and medium speed on blower motor is controlled by resistor and its actual speed is high. So because resistor is not working, blower motors actual speed which is high is working. It can be faulty blower motor or faulty blower motor resistor.

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.

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