Mercedes-Benz E350 fan not working while other functions operate normally on Mercedes-Benz E350

Some Mercedes-Benz E350 owners report experiencing issues with the fan not working while other functions operate normally. Potential causes include faults in the fan motor or clutch, fan relay or fuse, temperature sensor, or fan control module. Additionally, problems with the fan assembly, fan clutch, or coolant temperature sensor may lead to the radiator fan not functioning properly. In some cases, owners find that the auxiliary fan has stopped working, resulting in cooling problems. It is also recommended to check for fault codes, inspect the fan relay and temperature sensors, and address any coolant leaks that may cause faulty readings. Some owners have identified that the fan may remain on high speed due to a loose solder joint on the PC board or water intrusion in the electrical connector to the fan motor. Furthermore, electric radiator fans have a limited lifespan and may require servicing or replacement, particularly if they operate with an oil-filled fan clutch.