1. Faulty Fan Motor: The fan motor itself could be faulty or burned out. Check for any visible damage or signs of wear on the motor.
2. Faulty Wiring: Verify that all wiring connections to and from the fan motor are secure and not damaged.
3. Blower Motor Resistor: The blower motor resistor is responsible for controlling the speed of the fan motor. If the resistor fails, it can affect the fan's operation. Check the blower motor resistor for any damage or corrosion.
4. Temperature Control Switch: The temperature control switch regulates the amount of heat produced by the heater core. If the switch is faulty, it can prevent the fan from running and the heater from producing heat.
5. Thermostat: If the thermostat in your car is malfunctioning, it may not be properly regulating the temperature, causing the fan not to run and the heat to be inoperative.
6. Heater Core: In severe cases, a clogged or damaged heater core could also be the culprit, preventing hot coolant from flowing through and generating heat.
7. Control Module: The electronic control module for your car's heating and ventilation system may be malfunctioning. This module is responsible for controlling the fan motor and temperature functions.
8. Cabin Air Filter: A clogged or dirty cabin air filter can restrict airflow and affect the fan's performance.
To diagnose and fix the issue, it is best to consult with a qualified mechanic.
