The fan does not turn off and even works even if the engine is warm in the cold. The most probable cause is the air conditioning. With the air conditioning on, the fan always works. If the air conditioner is off, the problem may be in the malfunctioning temperature sensor or thermostat. You should also check the temperature sensor transaction. If the engine control unit does not receive temperature information, the fan is switched on automatically to avoid potential overheating.

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