What is the reason for one car radiator fan spinning while the other does not?

1 Answers
AnaRose
07/30/25 7:04am
1. Inaccurate water temperature: Most modern car radiator fans operate electronically based on temperature control. Therefore, the fan typically starts spinning normally only when the car's internal water temperature reaches the required level. If the temperature is too low, the radiator fan will not spin. Hence, if the car radiator fan fails to spin, the first thing to check is whether the water temperature meets the requirement. 2. Relay malfunction: If the water temperature is appropriate but the car radiator fan still does not work, the issue might lie with the fan's relay. A faulty relay can prevent the car radiator fan from operating. 3. Temperature control switch problem: If the above two aspects are not the issue, then the temperature control switch should be inspected. This component can sometimes develop faults, which may affect the operation of the car radiator fan, so it should also be checked carefully.
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