- Faulty blower motor: The blower motor itself may have failed. Check the motor for any visible damage or signs of wear and tear.
- Faulty blower motor resistor: The blower motor resistor is responsible for controlling the speed of the blower motor. If the resistor is faulty, it can prevent the motor from working at any speed.
- Faulty wiring: The wiring to the blower motor or resistor may be damaged or disconnected. Check the wiring for any loose connections or damage.
- Faulty HVAC control module: The HVAC control module is responsible for controlling the operation of the heating and ventilation system. If the module is faulty, it can prevent the blower motor from working.
- Blower motor relay: Check the blower motor relay to see if it is working properly. If the relay is faulty, it can prevent the blower motor from getting power.
Since the rear blower motor is working and is warm, it is likely that the problem is with the front blower motor or its associated components.
Here are some additional things you can check:
- Check the fuses: There may be a fuse that controls the blower motor. Check the fuse box and replace any blown fuses.
- Check the power supply: Make sure that the power supply to the blower motor is working. You can do this by using a multimeter to test the voltage at the blower motor connector.
- Clean the blower motor and housing: If the blower motor and housing are dirty, it can prevent the motor from working properly. Clean the motor and housing using a vacuum cleaner and a damp cloth.
- Inspect the air duct: Make sure that the air duct is clear and not obstructed. If the air duct is obstructed, it can prevent the blower motor from pushing air through the vents.
If you are unable to identify the cause of the problem, it is best to take your vehicle to a qualified mechanic for further diagnosis and repair.
