What is the reason for the car's cooling fan to keep running?
2 Answers
The reason for the car's cooling fan to keep running is a faulty temperature sensor or wiring issues. Specific details are as follows: Faulty Temperature Sensor: If the radiator fan keeps running while the engine cooling system operates normally and there is no shortage of coolant, it may indicate a malfunction. The most likely fault point is a constantly open temperature sensor. Wiring Issues: However, if the car has completely cooled down but the fan still does not stop and continues to run, it may indicate a fault in the cooling fan assembly, wiring, or excessively high coolant temperature. It is recommended to have a professional mechanic diagnose the issue at a service center.
I've also encountered situations where the fan keeps running while driving, and there could be several reasons for this. The most common one is an issue with the cooling system. For example, a faulty water temperature sensor might falsely indicate high temperatures, causing the fan to run continuously; a stuck thermostat that won't open prevents coolant from circulating for proper cooling, leading to the fan running non-stop. Additionally, malfunctions in the air conditioning high-pressure switch or relay can force the fan to operate. I've personally experienced a short circuit where damaged wiring caused the fan relay to stay engaged. In fact, prolonged fan operation not only consumes electricity but is also bad for the engine and can easily drain the battery. It's advisable to check the coolant level and radiator cleanliness as soon as possible. If the fan doesn't stop after high-speed driving, it's best to immediately seek a professional auto repair shop for diagnosis.
