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Author Topic: Cooling Fan on when engine is cold?  (Read 5009 times)

Offline Tadpole99

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Cooling Fan on when engine is cold?
« on: November 16, 2013, 04:17:49 pm »
Hi there,

My engine cooling fan goes on and off even when the engine is stone cold, when the fan comes on it stays on for maybe 15 seconds spinning at a very high speed then turns off again for a few minutes.

Any ideas why this is?

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Offline Bow

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Re: Cooling Fan on when engine is cold?
« Reply #1 on: November 16, 2013, 07:54:46 pm »
That be the air con fan more then likely mate. Turn of your heaters fan in car and see if it still does it
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Offline Tadpole99

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Re: Cooling Fan on when engine is cold?
« Reply #2 on: November 18, 2013, 07:46:11 pm »
With the aircon off (ECON mode on) the fan still does this
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Offline Bow

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Re: Cooling Fan on when engine is cold?
« Reply #3 on: November 19, 2013, 02:13:38 pm »
Mine does as well. it's the air con fan apparently. Sure one of the Mk5 gods will comment soon lol
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Offline john87

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Re: Cooling Fan on when engine is cold?
« Reply #4 on: November 21, 2013, 08:15:53 pm »
If your A/C is switched off (A/C light off in later cars / ECON light on in earlier cars) then none of your radiator fans should be running when the engine is cold.

I believe the mk5 is prone to the coolant temperature sensor failing, which may fool the system into bringing the fan on, possibly this is your problem?
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