- Faulty ignition switch
- Faulty heater fan motor relay
- Faulty heater fan motor resistor
Troubleshooting steps:
1. Check the ignition switch. The ignition switch provides power to the heater fan motor relay. If the ignition switch is faulty, it may not be providing power to the relay, which would cause the heater fan motor to continue running after the engine is turned off.
2. Check the heater fan motor relay. The heater fan motor relay is responsible for turning on the heater fan motor when the ignition switch is turned on. If the relay is faulty, it may not be turning off the heater fan motor when the ignition switch is turned off.
3. Check the heater fan motor resistor. The heater fan motor resistor is responsible for controlling the speed of the heater fan motor. If the resistor is faulty, it may not be providing the correct amount of resistance, which could cause the heater fan motor to run at full speed even when the ignition switch is turned off.
Additional information:
* If the heater fan motor is still running after you have checked the ignition switch, the heater fan motor relay, and the heater fan motor resistor, you may need to have a professional mechanic diagnose the problem.
* The heater fan motor is located on the passenger side of the engine compartment, behind the glove box.
* The heater fan motor relay is located in the fuse box in the engine compartment.
* The heater fan motor resistor is located on the passenger side of the engine compartment, near the heater fan motor.
