How do you fix a blower motor resistor?

How do you test a bad blower motor resistor?

Place one lead of the Ohmmeter on terminal 1 of the resistor. Place the other lead on terminal 2 and check against specifications. If this circuit is open, showing infinity on the Ohmmeter, the blower resistor must be replaced.

How much does it cost to replace a blower motor resistor?

The average cost for blower motor resistor replacement is between $108 and $137. Labor costs are estimated between $44 and $55 while parts are priced between $64 and $82. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.

What are the signs of a bad blower motor relay?

If you have a faulty blower motor, you may experience low airflow from the vents, even when the fan is on high. There will be no air coming from the vents if your fan isn’t working due to a bad blower motor resistor.

Will a blower motor work without the resistor?

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.

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Why does my air only work on high?

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.

Why is my blower motor not working?

The most common reason why your blower motor won’t work on any speed is that you have a bad or blown a fuse. … You want to make sure to check the blower motor fuse and also the HVAC controller fuse because either one of these being blown can cause the blower motor to stop working.

Is my blower motor or resistor bad?

If the airflow from the vents is weak…



If you try to increase the air pressure and you feel no difference in the pressure blowing, then your blower motor resistor may be failing. A damaged blower motor resistor will work on one fan speed which may not be enough to keep the inside of your car cool or warm enough.

Why is the blower in my car not working?

If the blower doesn’t receive power, check that the blower fuse isn’t blown. A blown fuse often indicates an underlying problem, so never replace one with a larger fuse to prevent it from blowing out again.

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