What Are Some Common Problems That Occur With a Blower Motor Resistor?


Quick Answer

Some common problems that occur with a blower motor resistor include corrosion on the resistor and an increased electrical current to the resistor. Both of these problems results in the failure of the resistor.

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Full Answer

The blower motor resistor runs the blower motor in a car with a manual heating system and air conditioner. Symptoms of a failed blower motor include a total failure of the fan to blow any air into the car and the ability of the fan to only blow air when set on high. Although the common problems result in a failure of the blower motor resistor, it's easy to test the resistor for current output, and it's a relatively inexpensive part to replace.

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