What is a heater blower motor resistor replacement?

During this service, the mechanic will remove the glove box door to inspect the electrical circuits underneath the dashboard in the heater/airconditioning compartment to confirm a faulty resistor and replace it.
A heater blower motor resistor replacement service can cost between $149 and $494 depending on the car you drive and the cost of labor.

How to replace a heater blower motor resistor

Replacing a heater blower motor resistor is a standard service. Here are the steps your mechanic will usually complete replacing the faulty resistor:
  • Remove the glove box door.
  • Disconnect the wiring harness and unbolt the screws.
  • Remove faulty heater blower motor resistor.
  • Install the new heater blower motor resistor.
  • Tighten and reattach wiring harness,
  • Reinstall the glove box door.

When do I need to replace my heater blower motor resistor?

You’ll want to replace your heater blower motor resistor if your fan is stuck on one speed or there is no air coming from the vents.
You can put off replacing your heater blower motor resistor for as long as you are willing to sacrifice maintaining a comfortable temperature in your car. Without a functioning resistor, you’ll sweat in the summer and shiver in the winter.

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