Question about 2003 Mini Cooper

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The cooling fan on my 2003 Mini 'S' cycles on and off every few seconds even just after starting from cold. What is wrong with it?

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  • Mini Master
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Probably nothing, but for peace of mind, you might buy a new thermostatic switch and replace the current one which may be a little fussy. Check on the lower tank of your radiator for a device mounted there with either one or two wires coming from it; this is where they are normally mounted. They are typically from 3/4 to 1" in diameter and may have a hex nead or base to allow removal and installation. If is wise to use silicone sealant (or gasket silicone) when mounting one of these and don't over-torque the new one since you are dealing with a copper or aluminum tank and they aren't very strong.
If you start with a cold engine and place a basin under the tank, you can probably remove and replace the sensor without much coolant loss but prevent it ending up on the ground to avoid poisoning domestic pets as they like the sweetness and aren't all too bright. Make sure you replace the lost coolant.

Posted on Jul 19, 2009

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  • Mini Master
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Most likey needs a new coolant sensor

Posted on Jul 19, 2009

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