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  1. #1
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    Car won't get warm and fan keeps coming on

    i got a a3 on a 04 and for the past fer days the fan keeps coming on every few minutes while im driving and when i get out the car its very loud and the fan goes on at least twice even if i only move the car for 2 mins, i took the car out for 30mins yesterday and noticed the the temperature gauge stays on cold. im not getting any warning lights on the dash
    does anyone know what this could be
    thanks

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  3. #2
    slim40's Avatar
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    Probably thermostat sticking, or possibly lack of coolant.
    Check coolant level first, then get thermostat checked (or replace). Whatever you do, don't top up coolant with the engine hot if it is empty!
    S3 8P remapped to 308bhp/395Nm, all the toys, but no buckets

  4. #3
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    the gauge wont get walm at all so i was thinking to get a temp sensor and try that could that be the problem
    Last edited by ru4shaw; 8th September 2009 at 11:17.

  5. #4
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    Forget the gauge for now, do you get hot air from the heater blower?
    If so, then I'd look at the thermostat, if not then more than likely lack of coolant. The fan comes on because the temp sender and fan switch are in different locations- at least they used to be ;-)
    First and easiest task to do is check the coolant level in the expansion tank- engine COLD, unless you want to risk ending up with a face like the elephant man!
    Last edited by slim40; 8th September 2009 at 11:40.
    S3 8P remapped to 308bhp/395Nm, all the toys, but no buckets

  6. #5
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    checked the coolant level and its ok but just now i let me girlfriend drive the car while a ran in the house to pick something up and she said she stalled it and wouldnt but on the third time it did and now its all running fine again
    i have noticed that i top up the coolant maybe every month, is that normal

  7. #6
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    i get hot and cold air from the blower

  8. #7
    slim40's Avatar
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    It does sound like a thermostat issue then.
    No, you shouldn't be topping up the coolant at all, sounds like there's a leak somewhere. It might something as daft as the expansion tank cap seals going, or venting off even if your engine is getting too hot. As you are no doubt aware, there should be some air in the expansion tank, so don't overfill above the marked level- usually half way up the tank, or where the two halves are joined.
    S3 8P remapped to 308bhp/395Nm, all the toys, but no buckets

  9. #8
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    someone else said it might the the thermostat aswell
    im going to get a workshop manual so i can see how to change bits and see how to give the car a service do you know whats the best to buy
    http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT
    http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT

    any of these good?
    thanks

  10. #9
    slim40's Avatar
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    Either of those look ok. I've always used Haynes manuals in the past- useful for novice through to the expert mechanic. If you are a novice, then the step by step guides in Haynes can't be beaten! Those official Audi CD's/DVD's won't have step by step procedures in them, although the fault finding guides and tech spec will be very comprehansive.

    Hope this helps
    Si
    S3 8P remapped to 308bhp/395Nm, all the toys, but no buckets

  11. #10
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    alright thanks ill get one of the 2
    i use to have the haynes for my old car but i dont think you can get it for the a3

  12. #11
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    As stated I think you should check the Thermostat.... but with the coolant loss sounds like you might have a blown head gasket if there aren't any leaks in the system.

    Have you checked to see if the oil has turned like a milkly brown colour? or Residue on the cap?

  13. #12
    slim40's Avatar
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    Quote Originally Posted by 330_2_S3 View Post
    As stated I think you should check the Thermostat.... but with the coolant loss sounds like you might have a blown head gasket if there aren't any leaks in the system.

    Have you checked to see if the oil has turned like a milkly brown colour? or Residue on the cap?

    Good one, I forgot about the old yoghurt in the oil cap!
    S3 8P remapped to 308bhp/395Nm, all the toys, but no buckets

  14. #13
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    ill have a look
    thanks

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    Coolant sensor, read the fault codes and this may be an issue.

    If you car has aircon?
    The fans may be coming on for the air conditioning as they are switched by the aircon system pressure. On warm days the fans will come on straight away.

  16. #15
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    everything seems to be ok now after it stalled
    how would i get the fault codes

  17. #16
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    You'll need one of those VAG-COM toys (PC based, expensive), or a handheld unit that plugs into the OBD port under the dash. A lot of garages and tuning shops have them. And Audi of course!
    S3 8P remapped to 308bhp/395Nm, all the toys, but no buckets

 

 

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