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Author Topic: Rad fans coming on, 30s from start-up??  (Read 5400 times)

Offline Sie

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Rad fans coming on, 30s from start-up??
« on: April 01, 2011, 10:29:00 pm »
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
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Saint Steve

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Re: Rad fans coming on, 30s from start-up??
« Reply #1 on: April 01, 2011, 10:31:32 pm »
Is it not your Aircon pump starting up?
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golfecho5

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Re: Rad fans coming on, 30s from start-up??
« Reply #2 on: April 01, 2011, 11:14:26 pm »
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.

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Offline AnilS

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Re: Rad fans coming on, 30s from start-up??
« Reply #3 on: April 02, 2011, 06:17:16 am »
Ours is the same. :scared:
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Offline alexperkins

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Re: Rad fans coming on, 30s from start-up??
« Reply #4 on: April 02, 2011, 08:09:45 pm »
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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Offline AnilS

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Re: Rad fans coming on, 30s from start-up??
« Reply #5 on: April 02, 2011, 09:48:18 pm »
Whats the remedy?
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Offline alexperkins

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Re: Rad fans coming on, 30s from start-up??
« Reply #6 on: April 02, 2011, 10:01:39 pm »
New fan  :signLOL:
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Offline Sie

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Re: Rad fans coming on, 30s from start-up??
« Reply #7 on: April 02, 2011, 10:41:17 pm »
Thanks for the answer Alex, so does anyone have a part number for the fan frame and price??

Thanks

Sie
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Offline alexperkins

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Re: Rad fans coming on, 30s from start-up??
« Reply #8 on: April 02, 2011, 10:42:22 pm »
I'll get one tomorrow for you :) what year is yours?
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Offline Sie

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Re: Rad fans coming on, 30s from start-up??
« Reply #9 on: April 02, 2011, 10:58:36 pm »
2005, one of the old girls

Thanks

Sie
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Offline Weston

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Re: Rad fans coming on, 30s from start-up??
« Reply #10 on: April 02, 2011, 11:55:25 pm »
Mine does this in the warmer weather with air con on, couldn't justify the £400+ I was quoted to fix it seeing as everything still works anyway
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Offline AnilS

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Re: Rad fans coming on, 30s from start-up??
« Reply #11 on: April 03, 2011, 08:29:31 am »
Quote from: alexperkins on April 02, 2011, 10:01:39 pm
New fan  :signLOL:

Donut :signLOL: I could have guessed that bit but was hoping it would be a small (cheap) fix. Ours is a 2005 and would also be interested like Sie.

Ours does with A/C on or off. Makes no difference.

Thanks  :happy2:
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Offline alexperkins

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Re: Rad fans coming on, 30s from start-up??
« Reply #12 on: April 03, 2011, 09:30:06 am »
 :grin:

On the polos, it was possible in some cases to repair the blown solder joint, but you have to use silver solder due to the amount of heat generated - normal solder just melts again!

Let me find the part number for you...

You should have two fans...therefore can you tell me which one is spinning lol!
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Offline Sie

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Re: Rad fans coming on, 30s from start-up??
« Reply #13 on: April 03, 2011, 04:21:52 pm »
When looking from the front of the car, the rh one still works and spins, Lh (drivers Side) doesnt.

Thanks

Sie
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Offline AnilS

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Re: Rad fans coming on, 30s from start-up??
« Reply #14 on: April 03, 2011, 05:14:24 pm »
Quote from: Sie on April 03, 2011, 04:21:52 pm
When looking from the front of the car, the rh one still works and spins, Lh (drivers Side) doesnt.

Thanks

Sie

DITTO. :happy2:
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