All Things Mk5 > How to Guides / Troubleshooting

Rad fans coming on, 30s from start-up??

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Sie:
Howdo all

Just wondering if anyone else has had this problem, happens near enough everytime as title says 30s after start up, stay on for about 2-3 mins then go off.

did check for fault codes a while back before i got rid of my vagcom lead, was doing it then, maybe not as much.

Any ideas?? thanks

Sie

Saint Steve:
Is it not your Aircon pump starting up?

golfecho5:
I get this too, just gave up trying to find a solution. Local VW dealer said it was due to the smaller fan not working properly so I had to replace the both to get to the bottom of it. Then the odd stuff happens, when the car is flashed at the dealer it goes away and I do not get any probs for months - then it comes back. Checked both fans and they both work but still get the fan coming on after startup. Not Air-Con as it's the main Big bugger that starts up.

Is it to do with re-maps - sounds odd but can't put my finger on this one either. Gave up till I saw you mentioned it as apart from being annoying they go off after you get on the run.

AnilS:
Ours is the same. :scared:

alexperkins:
If you have the aircon turned on this is a common failure of the speed resistor in the fan as it cant run a low speed, then the condenser rad heats up so hot the fan comes on full blast.

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