What Are the Reasons for the Car's Electric Fan Not Working?
2 Answers
Car's electric fan not working is due to reasons such as water temperature not meeting requirements, relay failure, thermostat switch issues, etc. Water temperature not meeting requirements: Most car radiator fans nowadays operate with electronic temperature control, so the fan usually starts working only when the internal water temperature reaches the required level. If the temperature is too low, the radiator fan won't turn. Therefore, if the car radiator fan isn't working, the first thing to check is whether the water temperature has reached the required level. Relay failure: If the water temperature meets the requirements but the car radiator fan still doesn't work, the issue might be with the fan's relay. If the relay fails, the car's radiator fan won't function either. Thermostat switch issues: If neither of the above issues is present, then check the thermostat switch. Sometimes, faults can occur here, which can also affect the operation of the car's radiator fan, so it's important to inspect this as well. Motor used for too long: If the electric fan has been used for a long time, the motor may wear out. After the motor's bushing wears down, it can easily burn out. Prolonged use of the motor can also increase its internal resistance, reducing its load-bearing capacity, making it unable to drive the fan blade. In this case, replacing the motor is the solution.
It's quite frustrating when the car's electric fan stops working. I've tinkered with it many times myself. The most common issue is a blown fuse, which is located in the engine compartment fuse box. Simply replace it with the same model to fix the problem. Relay failures are also frequent, especially in older cars, where the relay contacts can get burned out, causing an open circuit. If the temperature control switch is faulty, the fan won't start even on hot days, and the coolant temperature will skyrocket. Additionally, the fan motor itself can fail—common issues include worn-out carbon brushes or short-circuited coils. Don't overlook wiring problems either, such as loose connectors or harness wear leading to grounding and power interruptions. When inspecting, always remember to turn off the engine and let the car cool down. The most reliable method is to unplug the fan connector and test the voltage with a multimeter.
