What Causes the Abnormal Noise in BMW 3 Series Air Conditioning Fan?

1 Answers
Madeline
07/30/25 7:06am
BMW 3 Series Air Conditioning Fan Abnormal Noise Causes: Water temperature not reaching requirements, relay failure, thermostat switch failure. The following details the causes: Water temperature not reaching requirements: First, check whether the water temperature has reached the required level. If the water temperature cannot rise, the car engine needs to be inspected. Relay failure: If the relay fails, replacing the damaged relay can solve the problem. Thermostat switch failure: Some faults in the thermostat switch will also affect the operation of the car radiator fan. Replacing the damaged thermostat switch can resolve the issue.
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