What is the Heater Blower Motor?
The heater blower motor forces air through the vents. You are able to control the speed of the motor through switches, buttons, and dials on the dashboard. The motor contains a resistor which lets it to change the speed of the fan. Without this part you will not be able to change the speed of the airflow from the blower motor.
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Facts to Note:
A bad connector can cause a heater blower motor to stop functioning, even if the blower motor is still in working condition.
Sometimes the heater blower motor stops functioning because it is jammed or stuck; in this case it can been repaired rather than replaced.
If the heater blower motor has been damaged by a fluid leak, then another component of your vehicle is malfunctioning and needs to be addressed.
How to Fix:
Examine electrical circuits to check for power and proper grounding to motor.
Remove and change the faulty motor.
Confirm that the heater is working.
Due to the high amount of current, it is possible for the power connector to get too hot and melt. This will cause a bad connection and the heater blower motor will not work. Changing the connector can fix this problem without the need for a new blower motor. Your mechanic should examine the connector before replacing the heater blower motor.
Common signs indicating you may need to change the Heater Blower Motor:
Heater fan operates at only one speed instead of multiple speeds.
Air is not coming out of the vents (when you turn AC or heat on).
Importance of this service:
In addition to providing you with hot air in cold weather, the blower motor is essential in circulating air through your car.