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At what temperature does the fan start on a BMW 535?

1 Answers
CamillaMarie
08/26/25 5:30am
The fan on a BMW 535 starts operating when the coolant temperature reaches 92°C. Fan operation: The car's electric fan is controlled by a thermostat. When the coolant temperature rises to the upper limit, the thermostat activates the power supply and the fan starts working. When the temperature drops to the lower limit, the thermostat cuts off the power and the fan stops. Methods to determine fan condition: Visually inspect the fan motor's ventilation port for any signs of burnt coil discoloration. If burnt marks are present, it indicates the fan motor coil is damaged and unusable. Smell the fan motor for any burnt coil or plastic odors. If detected, the fan is unusable.
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