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Why Does My Car Fan Spin When The Engine Is Cold?

This thermal transfer (or contactor) may also fail, wherein case the fan might not switch on when needed. It can cause overheating and then engine failure.

Conversely, a faulty contactor can send inaccurate measurements to the fan, in an effort to therefore run constantly, even when the engine is bloodless. Consequently, it's going to have extra problem heating up and require excessive fuel consumption to function at high speed. This extra stress will sooner or later harm the cylinder head gasket, which is meant to seal the combustion chamber.

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