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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. In addition, the car battery will drain more quickly till it's far absolutely discharged. How Do You Know If A Car Fan Is Working? Several checks are possible to test the perfect operation of a cooling fan. Start with a easy visible inspection to verify that the fan drive belt is in correct situation. Look for traces of grease on its surface and watch for signs of wear and tear. Then prevent the fan motor and spin it together with your hand. The blades and propeller should be able to turn evenly without pain or chattering noise. To test the electrical component, begin through disconnecting the poor terminal of the principle battery, then take a look at the circumstance of your fuses. If one among them has blown, replace it. Also, look at the thermal transfer. If it's far oxidized or clogged with soot, it'll no longer be able to feature correctly, that may cause immoderate use of it. Even running it when the engine is cold. Also, investigate wiring and connectors for oxidation or damage. These are often the primary causes of failure and may be quickly repaired by means of a professional. Finally, test its electricity deliver. Connect the blue cause the negative (-) battery terminal and the alternative lead to the advantageous ( ) terminal. Unplug the fan and put off its connector. It ought to begin spinning. Otherwise, it have to get replaced. How Much Does A Fan Replacement Cost? The price of an automobile fan substitute may also vary relying at the car model—although, the most common brands (Renault, Citroën, Peugeot. You can count on an invoice of among 45 and a hundred and fifty euros. You will have to upload to this the hard work price until you embark on the substitute operation to your very own. Repair offers used spare parts for all brands to permit you a few savings. Regardless of your car producer, you'll locate cut price fans from unique parts in our on line store.