Symptoms of a Bad or Failing Heater Blower Motor Resistor

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Cost of Replacing a Bad or Failing Heater Blower Motor Resistor

Common signs include the car's heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Car Heater Blower Motor Resistor Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2014 Bentley Mulsanne $139 $69.09 $70.00 21% $176.59
2009 Volkswagen Jetta $137 $67.21 $70.00 21% $174.71
2010 Toyota Camry $196 $126.16 $70.00 16% $233.66
2003 Cadillac Escalade ESV $200 $130.18 $70.00 15% $237.68
2014 Audi Q5 $748 $677.98 $70.00 4% $785.48
2007 Ford Mustang $101 $30.58 $70.00 27% $138.08
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How to Diagnose a Bad or Failing Heater Blower Motor Resistor?

blower motor resistor

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. As the fan speed is one of the most frequently adjusted settings of the air conditioning system, the blower motor resistor is put under constant stress, which can cause it to eventually fail. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system. Usually a bad or failing blower motor resistor will produce a few symptoms that can alert the driver of a potential issue.

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 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. 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

Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. If the blower motor resistors’ internal components fail it may cause the blower motor to malfunction, or not function at all on one or more of the settings. This can also be caused by a blower motor switch, so a proper diagnosis is highly recommended if you are uncertain of what the issue may be.

3. No air from the vehicle’s vents

Another symptom of a faulty blower motor resistor is no air from the vehicle’s vents at all. Power to the blower motor is fed through the blower motor resistor, so if it fails or has any issues power can be cut off to the motor. 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.

As the blower motor resistor is the component directly responsible for powering the blower motor, when it fails it major issues with the blower motor and the heating and air conditioning system can be experienced. If your vehicle is displaying any of the symptoms above, or you suspect that your blower motor resistor may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the component should be replaced.

heating
air conditioning
blower motors

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Recent Car Heater Blower Motor Resistor Replacement reviews

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YourMechanic Car Heater Blower Motor Resistor Replacement Service

Average Rating

4.9/5

Number of Reviews

128

Rating Summary
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Richard

10 years of experience
419 reviews
Richard
10 years of experience
I did not know what to expect when choosing this service. I am so glad I did, Richard did not waste any time in changing my A/C compressor belt, he also performed a diagnostic check on my fan control knob(which only worked on speed 4, 5). He found the problem and was able to fix that too. Richard is everything you want in a mechanic and more. He is, professional, honest, reliable, friendly, fast and knowledgeable. Mahalo for the great work, Richard.
2004 GMC SIERRA 2500 HD - HEATER BLOWER MOTOR RESISTOR - LAS VEGAS, NEVADA

Eliseo

9 years of experience
179 reviews
Eliseo
9 years of experience
Eliseo arrived on time and was professional and very helpful. Fixed the issue and took the time to explain the issue. On the original online tool, looking at the issue with the car, the system indicated it was one part that needed to be replaced. In actuality, it was a different part that was needed. Eliseo was able to get the part later this afternoon, and was very flexible and came back later today to complete the repair, so that I did not need to make arrangements to reswizzle my schedule for tomorrow!
1998 HONDA CIVIC - HEATER BLOWER MOTOR RESISTOR - SPRING, TEXAS

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
Peter did a great job to determine the problem with the ac system and even had the part that needed to be replaced. This appointment was originally just a diagnostic visit but he ended up being able to make the fix. He showed up early and, as always, explained everything as he was trying to determine the problem. Peter is a great guy and the best mechanic who has ever worked on my car.
2003 HONDA CR-V - HEATER BLOWER MOTOR RESISTOR - TEMPE, ARIZONA

Ruben

32 years of experience
51 reviews
Ruben
32 years of experience
I've dealt with many mechanics since becoming a car owner 36 years ago, but I have never experienced the complete mechanic (professional, straight-forward, convenient, knowledgeable, goes above and beyond), courteous, and friendly) until Ruben! I will be, and have already, recommended Ruben to my friends and family! Thank you, Ruben, for a job well done! My Genesis thanks you, too!
2013 HYUNDAI GENESIS - HEATER BLOWER MOTOR RESISTOR - LAKELAND, FLORIDA

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