Table of Contents
What does a blower fan resistor do?
Blower resistors are resistors which are used to control the fan speed of automotive blowers. The fan speed can be changed either by switching the blower resistor resistance mechanically using a rotating lever, or electronically by the air conditioning system.
Can you repair a blower motor resistor?
The average cost to replace the blower motor resistor at a repair shop is between $44 and $55 in parts and $70 in labor costs, for a total cost of around $114 to $125. On the other hand, you can easily fix the blower motor resistor at home in about an hour (even if you’re a beginner) and for around $70.
What are the symptoms of a bad blower motor resistor?
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.
Why does the blower fan only work on high speed?
When a blower resistor fails, the highest fan speed usually is the only one that still works because it essentially bypasses the resistor and receives the maximum amount of voltage. When the resistor is working, it reduces the amount of voltage going to the lower fan speeds, so the fan runs slower.
How to replace blower motor and resistor?
Disconnect Your Negative Battery Terminal. Start by disconnecting your negative battery cable.
How do you test a blower motor resistor?
Disconnect the blower motor resistor from its connector and remove it from its location.