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What to Do When the Car Fan Keeps Running Without Overheating?

2 Answers

Madison

09/01/25 7:40am

Solution for the issue of the car fan continuously running without overheating involves inspection and repair. Below are the relevant details: Inspection and Repair: If the fan continues to run after the temperature has dropped, it indicates a fault in the cooling fan assembly or internal wiring. It is recommended to visit a professional auto repair shop for inspection and repair. Reasons: The temperature inside the radiator has not fully risen. Many modern car models use electronically controlled thermostatic fans, so if the system does not detect high temperatures, it cannot activate the fan; a faulty internal relay, which directly affects the operation of the radiator fan when malfunctioning; issues with the thermostat switch.

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StAsher

09/14/25 3:24am

When my car's fan keeps running non-stop even though the temperature gauge shows normal readings, I need to take it seriously. This could indicate a faulty temperature sensor that mistakenly thinks the engine is overheating and commands the fan to operate. Alternatively, the thermostat might be stuck open, allowing too much coolant flow and triggering the fan incorrectly. Another possibility is a stuck fan relay or a short circuit in the wiring. If the air conditioning is turned on, the fan will naturally run to assist with cooling, which isn't a major concern. However, prolonged operation like this not only increases fuel consumption but also wears out components and shortens the fan's lifespan. I recommend first trying to turn off the air conditioning to see if the fan stops. If that doesn't work, check the fan fuse in the fuse box to ensure it's intact. If the fuse is fine, use a multimeter to test the sensor and wiring. It's best to visit a repair shop early to diagnose trouble codes with professional tools, preventing minor issues from turning into major repairs. I've experienced this situation before, and replacing the temperature sensor restored everything to normal.

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