* Radiator fan relay: This relay is responsible for turning on and off the cooling fan based on the temperature of the coolant. If the relay is faulty, it could cause the fan to run continuously, even when the engine is cold.
* Temperature sensor: This sensor sends the coolant temperature to the ignition control module (ICM), which then controls the fan relay. If the temperature sensor is faulty, it could send the wrong signal to the ICM, causing the fan to run when it shouldn't.
* Wiring issue: There may be a problem with the wiring that controls the cooling fan. A damaged wire or loose connection could cause the fan to run constantly.
To diagnose the problem, you can try the following steps:
1. Check the radiator fan relay: This is usually located in the fuse box under the hood of the car. Remove the relay and check the terminals for any damage or corrosion. If the terminals are damaged or corroded, replace the relay.
2. Check the temperature sensor: This is usually located on the engine block near the thermostat. Unplug the sensor and check the terminals for any damage or corrosion. If the terminals are damaged or corroded, replace the sensor.
3. Check the wiring: Inspect the wiring that connects the cooling fan relay to the temperature sensor and to the battery. Look for any damaged or loose wires. If you find any damaged or loose wires, repair or replace them accordingly.
If you are unable to diagnose and repair the problem yourself, you can take your car to a qualified mechanic for further assistance.
