Stu
Member
Registered: 3rd May 00
Location: Madchester UK Drives: 2014 BMW M135i
User status: Offline
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Hi all
My fans have become a little over-active just lately and sometimes will run on after turning the engine off for 30 seconds or so.
- Water temp never moves from the centre 90 degrees
- Oil temp sits around the 90 degree mark
- I have plenty of water in the car
- I have made sure the aircon has not been on
- The fans will sometimes run on even after short journeys
- No faults found on VAGCOM
- No faults or warnings on the dash
- The cam belt was changed about 10k ago but Im not sure if the waterpump/thermostat were replaced like they should have been!
So I thought Id try VAGCOM again and again no faults were found BUT when I left the car running, with the bonnet up and both fans flat out I checked the temp on the VAGCOM. It started at just over 100 degrees and rose steadily up to 106 degrees before I turned it off, all this time the dash display didnt budge from 90 degrees!!!!! 
Now this would suggest to me thermostat as VAGCOM wouldn't pick up a mechanical failure of this and as I didnt let the car overheat the water temps have never been high enough to trigger a fault.
So, what do you guys think? Am I right with thermostat?
Just need a bit of reassurance before I strip the car down 
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Rich H
Member
Registered: 26th Oct 05
Location: West Sussex Drives: E46 M3
User status: Offline
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Help Zone 
But yes it does sound very much like that imo.
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Colin
Member
Registered: 4th Apr 02
User status: Offline
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I would say thermostat.
Time to trade in for a new RS6 Stu....just to be safe
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Stu
Member
Registered: 3rd May 00
Location: Madchester UK Drives: 2014 BMW M135i
User status: Offline
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quote:
Originally posted by Rich H
Help Zone
Doh, sorry! General chat is the only prt of the forum I use.............force of habit!
Tried RS246 but the replies on there arent great and i know there are some spanner monkeys on here!! 
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DannyB
Premium Member
Registered: 6th Feb 08
User status: Offline
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Someone on here will probably know mate, are parts expensive for them?
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John
Member
Registered: 30th Jun 03
User status: Offline
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The water temp gauge is set to always sit at exactly 90 unless the temperature is well outside of normal.
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Stu
Member
Registered: 3rd May 00
Location: Madchester UK Drives: 2014 BMW M135i
User status: Offline
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quote:
Originally posted by John
The water temp gauge is set to always sit at exactly 90 unless the temperature is well outside of normal.
Bit crap that innit really? I know my old P1 was the same!
As for parts, I know the stat itself is about £20 but Audi want 8 hours labour to fit it!!!  Ill do the belt, waterpump and tensioners while its in bits and all off!!!
Cheers guys
Stu
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John
Member
Registered: 30th Jun 03
User status: Offline
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All vag group cars are the same (well in the last 10 years at least)
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jr
Member
Registered: 20th May 02
Location: Kent
User status: Offline
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Fan control unit ?
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Bonney
Member
Registered: 14th Nov 04
Location: St Helens
User status: Offline
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Mines the same, Think its just the way that they are.
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allza
Member
Registered: 14th Jun 04
User status: Offline
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The fans themselves are prone to playing up, requiring a new set of fans. Or maybe the temperature sender sensor is faulty?
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Gizzy
Member
Registered: 30th Mar 08
Location: Carlisle Cumbria
User status: Offline
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Its either coolant temp sender roughly £6 for new one as these alwyas go but dont leave faults or waterpump has failed best way check this is to get hold of vag pressure test pump it up to 2bar and check for leaks hope that helps bud also seen the smaller of the 2fans fail this also does not always leave a fault test voltage at fan plug only a 3pin plug on left hand side can reach this with undertray removed
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