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Two different temperature readings - Please help!

Discussion in 'A3/S3 Forum (8L Chassis)' started by TDIQ, Oct 8, 2009.

  1. TDIQ
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    TDIQ 8L > 8P > 8V

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    [Oct 8, 2009]
    The fans in my 2002 1.6 A3 weren't coming on, meaning the car would be getting to 110 on the temperature gauge.

    Before I bought the car it had the following replaced:
    Fan temp sensor on the radiator
    Thermostat housing with thermostat and all sensors
    Fan relay control unit

    This still didn't solve the problem, and I was told it could be the waterpump because if there's no flow of water to trip the sensor, the fans won't come on.

    Anyway, I've now had the waterpump and cambelt replaced, and apparently the old waterpump was seized. Also, the fans were seized solid too. Apparently the car is still overheating.

    The garage has run diagnostics on it, and hasn't found anything other than there's two places to take the temperature of the coolant, and one is 30 degrees higher than the other. They said I'll need to go to an Audi specialist to get this sorted, but it seems like this is going to be a hugely expensive thing to fix.

    Has anyone got any ideas please as not even a decent garage can figure this out? It's driving me mad.

    Thanks
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  3. S3KO4
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    S3KO4 Member

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    [Oct 8, 2009]
    Make sure you don't over fill the coolant you need some space for air to expand when hot, if you follow the guid on how to display Reading on the claimate control on here, option 49 would be a digital read out from the ecu of the coolant temp, this is more accurate as your dail could be faulty! Good luck
    #2
  4. TDIQ
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    TDIQ 8L > 8P > 8V

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    [Oct 9, 2009]
    The coolant wasn't overfilled, but the thing that concerns me is the garage said the fans were seized solid. How much would a new fan unit cost me and is there anyway of narrowing the problem down further as I feel this could be a really costly job on a car I've barely driven yet :(
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  5. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Oct 9, 2009]
    I doubt very much that the fans are seized, never heard of that before. Could be they are faulty, but seized? If they are seized why on earth was this not diagnosed before all the other work was carried out. Fans not coming on? First thing I would check would be are the fans working? Obviously if the fans are faulty then this is the problem and luckily an easy and cheap fix. Shop around, try GSF, Audi don't make the fans they are probably Valeo or similar, also look out on ebay. You should be looking at £60 max for each and you can fit them yourself.
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  6. TDIQ
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    TDIQ 8L > 8P > 8V

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    [Oct 9, 2009]
    Thanks for the reply. The garage just said the fans were frozen solid or something along those lines, I'll have to ask them to explain exactly what they found.

    They said it could be the computer in the dashboard that's controlling the fans, and I need to take the car to an Audi dealership. Is there any other things I could try?

    Thanks
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