What is the situation when the car fan keeps running?

[DiElla]

It may be due to a loose circuit connection. You can try unplugging the fan's wiring harness and performing a separate power-off treatment. Additionally, this situation could also be caused by a damaged water temperature sensor or a stuck fan relay contact. Simply replacing it with a new one at a repair shop will suffice. The water temperature in the radiator hasn't cooled down yet: The water temperature in the radiator decreases slowly. When the engine is just turned off, the water temperature hasn't dropped yet, so the cooling fan will continue to work for a while before stopping. If the car has completely cooled down and the fan is still running continuously, it indicates a fault in the cooling fan assembly or the cooling fan circuit, and timely repair is recommended. Thermostat failure: Due to the thermostat, the temperature reaches the baseline but cannot send water to the radiator, or the amount of water sent is too little, causing the engine to overheat and the electric fan to keep running.

[DeKylie]

It's quite common for the car fan to keep running non-stop. If it's the AC fan, the issue might be that the AC is set too low or the control button is stuck and hasn't reset. I've also encountered problems with the fan relay sticking in the on position and failing to turn off. Additionally, a faulty thermostat can cause the fan to run unnecessarily, especially during hot summer days. Checking is simple: turn off the engine and wait a few minutes; if the fan doesn't stop, then there's definitely a problem. If not addressed promptly, the battery can drain quickly, making it difficult to start the car the next morning. I've had this issue with my previous car, and replacing the relay fixed it. It's advisable to regularly inspect the fan system during maintenance to prevent serious problems that could affect driving safety.

[DiKylie]

The car fan just won't stop, haha, it's a common topic in our car owners' group! The most common causes are a faulty fan relay or a malfunctioning temperature sensor, especially in older vehicles. For AC fans, check if the temperature setting is too low or if there's a bug. As for the cooling fan, it might keep running due to insufficient cooling after engine overheating. If the fan runs for too long after turning off the engine, say more than five minutes, that's a red flag. Try restarting the car or disconnecting the battery to reset the system. Oh, and sometimes fan blades get stuck—just clean out the dust and debris. It's not hard to fix; usually, a mechanic can replace the faulty part and solve the issue. The key is to pay attention to daily driving habits and avoid setting the temperature too high to overwork the fan.

[DeSkylar]

A continuously running fan is indeed concerning, especially when it doesn't stop after turning off the engine. Common causes include a stuck relay or minor control module malfunctions. Incorrect air conditioning system settings may also lead to abnormal fan operation. From my experience, if the fan keeps running, it can quickly drain the battery, making it difficult to start the car. Therefore, it's important to observe for a minute or two after parking to see if it stops automatically. Safety-wise, don't ignore this issue; visit a repair shop early to test the circuit with a multimeter or replace components. Related points include the fan being prone to aging under heavy load in hot weather. I regularly have the shop check the fan's condition to prevent potential issues, making it a habit for worry-free driving.