What are the symptoms of a bad car fan relay?

1 Answers
AdrianLee
07/30/25 6:17am
Relay damage can cause the low-speed fan to stop working, leading to the engine coolant boiling over. Car Fan: The car fan is generally used to cool the radiator. The fan's operation drives air flow, which helps lower the water temperature. However, the water temperature should not be too low—engine temperature that is too low is also not ideal. Additionally, components like the thermostat and water pump work together, so cooling only begins when a certain temperature is reached. Car Air Conditioning: Generally includes a refrigeration unit, heating unit, and ventilation system. This integrated setup makes efficient use of the limited space inside the car, with a simple structure and easy operation, making it a popular modern car air conditioning system internationally.
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