What is a Heater Blower Motor Resistor all about?
The heater blower motor resistor is located underneath the dashboard in the heater/AC compartment. The resistor enables the heater blower motor 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. It is also possible that the heater motor blower may not work at all. If the resistor has gone bad, it is likely that the fan will work only on the highest speed.
How it's done:
- Inspect electrical circuits to verify faulty resistor.
- Remove and replace the faulty resistor.
What common symptoms indicate you may need to replace the Heater Blower Motor Resistor?
- Blower motor only operates at 2 speeds instead of 4 speeds.
- Blower motor is not functioning (no air from vents).
How important is this service?
To ensure proper operation of the blower motor, the resistor has to be working correctly or else you may end up with either no airflow from the fan or you will be stuck on one speed.