✔ How To Know If Your Blower Motor Resistor Is Bad

How To Know If Your Blower Motor Resistor Is Bad

- July 12, 2017

Blower motor resistors can wear out. The resistor of the blower motor is responsible for transferring the electrical current thats required to move air through the vents of vehicle.

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How to know if your blower motor resistor is bad. Okcustomer it sounds like your blower has gone out or power to the blower is not not working. What can happen when a blower motor resistor goes bad is that the motor will run and then suddenly stop running on a regular basis. This also decreases the efficiency of the defroster as it uses the same fan.

If you start at the blower motor and check resistance in the circuit you will find the problem in no time. A blower motor without power will not be able to produce any air pressure and as a result the heating and air conditioning system will be left with no air coming from the vents. One of the first signs of blower motor failure is weak airflow.

The best way to check is to look under passenger side dash you may have to remove plastic piece unplug blower check for power in one of the two wires with the key on and ac defrost blower on high. This can be annoying but troubleshooting is easy. When a blower resistor fails the highest fan speed usually is the only one that.

The heater blower motor reduces or increases the amount of air blowing through the. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed usually high. Power to the blower motor is fed through the blower motor resistor so if it fails or has any issues power can be cut off to the motor.

The motor wears out over time and cant push as much air leaving you wondering what happened to the air power. There are several symptoms that appear when the resistor of the blower motor is going bad. The blower motor no longer works correctly if this occurs.

Setting the fan speed at its lowest setting for example will tell the resistor to. Air on the side of caution.