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Model specific boards => Golf mk4 => Topic started by: r3dal3x on 21 December 2014, 16:47

Title: Radiator fan problem GTi 1.8 20v turbo 1999
Post by: r3dal3x on 21 December 2014, 16:47

Hi guys, I have a problem with my radiator fan. Quite often when the temp gets up to 90 the fan will come on and go off every 4 - 5 seconds and continue to do this all the time, even when the engine cools down it continues to do this. It doesn't do it all the time but it is starting to happen more often than not. I have taken my car to two garages which have both plugged in computers but no faults are showing. The temperature never rises above 90 so it is still doing its job but something is obviously wrong. Has anyone else ever had this problem? Thanks Alex.

Title: Re: Radiator fan problem GTi 1.8 20v turbo 1999
Post by: topher on 22 December 2014, 15:43

sounds like the small fan isn't working so it relies on the big fan, diagnostic checks won't show anything you'll need to bridge the thermoswitch on the rad to test.

Title: Re: Radiator fan problem GTi 1.8 20v turbo 1999
Post by: r3dal3x on 22 December 2014, 16:26

Thanks for the reply and advice topher, I'll check that out  :wink:

Title: Re: Radiator fan problem GTi 1.8 20v turbo 1999
Post by: Dizzy_PD on 22 December 2014, 17:11

Hi mate,

All info on rad fans and their issues including how to fix are here:

http://uk-mkivs.net/topic/4773-fan-problem-poll-synopsis/

My fans are currently playing up exactly as yours are, and I need to do the 'resistor mod' to solve it.. A lot cheaper than replacing the fans and it's a permanent fix.

Please take a look at that link I posted

Title: Re: Radiator fan problem GTi 1.8 20v turbo 1999
Post by: r3dal3x on 23 December 2014, 16:43

Thanks Dizzy_PD, very useful link. Appreciate it.  :grin: