Mercedes-Benz SLK230 air conditioning fan runs with ignition off and only stops when battery is disconnected on Mercedes-Benz SLK230

Some Mercedes-Benz SLK230 owners report experiencing issues with the air conditioning fan continuing to run even after the ignition is turned off, only stopping when the battery is disconnected. This problem may arise due to factors such as the temperature of exhaust gases, transmission oil, and engine coolant, which could be part of a normal cooling process to prevent overheating. Some users have reported needing to pull the fuse to stop the blower motor, thereby avoiding battery drain. Potential causes for the fan's continuous operation include problems with the fan assembly, fan clutch, or coolant temperature sensor. Additionally, worn or damaged serpentine belts can affect the fan's operation. Owners who have stored their vehicles for extended periods may also encounter this issue, suggesting underlying problems that need addressing. It is advisable for affected owners to consult a professional mechanic to inspect and diagnose the fan-related components effectively.