Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How Long Does a Heater Blower Motor Resistor Last?

How Long Does a Heater Blower Motor Resistor Last?

Heater Blower Motor

Keeping the cabin of your car warm during the frigid temperatures of winter can be a lot easier said than done. If even one of the components of the heater are not working properly, it can prohibit the warm air from filling the cabin of the vehicle. Most car owners are unaware about just how many things have to work together in order for their car’s heater to function. The blower selector switch that is located in the cabin of the car helps to regulate the flow of air being let in. The heater blower motor resistor is what allows for you to select the different blower speeds.

The blower motor resistor is designed to last for the car’s lifespan. In most cases, these resistors will wear out long before the car does. Usually, the wear that the blower motor resistor has is due to the constant use that it gets and the heat that it is exposed on a regular basis. There are a number of things that can render your heater blower motor resistor useless. By keeping an eye out for repair issues with this part, you will be able to keep your heater blowing strong when needed. The professionals will usually check the resistor by getting a reading on how much electricity it is putting out.

If the electricity that the blower motor resistor is putting out is not enough to keep the blower fan regulated, it will need to be replaced. The heating and A/C system on your car is considered a closed unit, which is why it will not be checked during routine maintenance procedures. The only time that this resistor will get attention is when it is in need of repairs. The following are some of the things that you may notice when your heater blower motor resistor is broken:

  • The blower motor will not operate on all of the speeds
  • The air coming from the vents is very weak
  • There is no air coming from the vents

As soon as you start to notice one or more of these issues, it may be time to have your heating system checked. If you find that there are problems with the heater blower motor resistor, have a certified mechanic help you replace the heater blower motor resistor for you to help re-gain control of heat in your car.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


More related articles

P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P0291OBD-II Trouble Code: Cylinder 11 Injector Circuit Low
P0291 code definition When your vehicle’s PCM registers the P0291 code, it means that a voltage reading came from the fuel injector circuit – for cylinder number 11’s fuel injector –...

Related questions

Q: My service light says service temp. What do I need to look for?

Hi there. A low coolant level can illuminate the service light and create the heating and AC problem you have described. Check the coolant level while the engine is cold and top it off as necessary. Also, look around the...

Q: I have a 1999 Lincoln Town car that is making a rattling sound only when idle. Also my AC went out, it won't even let me turn on th

You likely have separate issues going on at once. Your vehicle's make and model has a history of bad blower motor switches. This is a control that takes driver commands and communicates with the blower motor what speed to run...

Q: A/C and heating fan

What is happening in your situation is that the A/C evaporator case is not draining as it should. The drain of the evaporator comes out of the firewall in the engine compartment and the drain can get clogged by debris...