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Model specific boards => Golf mk4 => Topic started by: Kus on 03 October 2011, 23:51

Title: Fans staying on after engine is off?
Post by: Kus on 03 October 2011, 23:51: Why is this happening ? Havnt got a clue about engines only body work :huh:
Title: Re: Fans staying on after engine is off?
Post by: Lewy on 04 October 2011, 00:05: They stay on to aid the cooling process. Should only be a matter of 20 seconds or so.
Title: Re: Fans staying on after engine is off?
Post by: daz veedub on 04 October 2011, 00:09: yep like what was said its normal :smiley:
Title: Re: Fans staying on after engine is off?
Post by: s-l-i-x on 04 October 2011, 00:14: If they stay on for hours then i'd start worrying :laugh:
Title: Re: Fans staying on after engine is off?
Post by: daz veedub on 04 October 2011, 00:21: Quote from: s-l-i-x on 04 October 2011, 00:14
If they stay on for hours then i'd start worrying :laugh:

:laugh: :laugh:
Title: Re: Fans staying on after engine is off?
Post by: Kus on 04 October 2011, 08:13: They stay on even when the ignition is turned and stay on for about 10 mins
Title: Re: Fans staying on after engine is off?
Post by: MaXXeH on 04 October 2011, 08:50: the only thing that can keep them running is the senser in the bottom of the rad
(thermo temp sensor)

it could just be sticking just replace it.
Title: Re: Fans staying on after engine is off?
Post by: Wayne on 04 October 2011, 08:55: Fan control unit near the battery is noted for giving problems
Title: Re: Fans staying on after engine is off?
Post by: Dalo Harkin on 04 October 2011, 11:52: Sorry to highjack the thread, but I'm not 100% sure mine is even coming on at all....
is there a physical way to check :huh:
Title: Re: Fans staying on after engine is off?
Post by: barrym381 on 04 October 2011, 11:56: Quote from: Dalo Harkin on 04 October 2011, 11:52
Sorry to highjack the thread, but I'm not 100% sure mine is even coming on at all....
is there a physical way to check :huh:
leave the engine running for 10-15 mins it should cut in once up to temp
Title: Re: Fans staying on after engine is off?
Post by: Dalo Harkin on 04 October 2011, 12:18: erm, pretty sure they aren't working then :shocked: unless they are inaudible :cry:
Title: Re: Fans staying on after engine is off?
Post by: Kus on 04 October 2011, 21:22: I'l take it to someone who knows what there doing have not got a clue where either of these sensors/buttons are..
Title: Re: Fans staying on after engine is off?
Post by: MaXXeH on 04 October 2011, 21:29: Fan control unit is under the battery tray.

The themo sensor is at the bottom of the rad your see a 3 pin connecter.
Title: Re: Fans staying on after engine is off?
Post by: Ant1981 on 04 October 2011, 21:37: I've never understood why some cars have the fans stay on for a while.

What are they doing? Nothing, it's of no value. The engine is off, so the waterpump is off, so no cooler water is reaching the engine, all that is being cooled is the radiator, which without water being pumped is of no value.
Title: Re: Fans staying on after engine is off?
Post by: MaXXeH on 04 October 2011, 21:47: It is just where the water is still hot. The thermo switch makes a circuit that keeps the fan running. Until the water cools below the set valve of the switch it wonâ€™t break the circuit.