Question about 2003 Audi TT

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2003 Audi TT Quatro Coupe. The radiator cooling fan does not work. Vehicle over heats because the fan does not work. Replaced the radiator cooling fan motor and the temperature sensor. The problems is still their. The diagrams indicate that their is a radiator cooling module. The Audi parts department has no diagram on the module. Need to know how the cooling Fan module works?

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  • jcfernandez8 Apr 21, 2009

    I replaced the fan on the left side because it was not working when I applied 12 Volts to the fan on the left The fan on the right works when applied 12 volts to it. I cannot verify with the AC because the AC evaporator is leaking freon and the sytem does not have freon. I suspect the Fan relay module but I have no information on how it works. When the temperature passes the midpoint the fan does not come on.

  • AFMtech May 11, 2010

    Have you ruled out a failed water pump? They are a very common fault. Also there is a radiator temp sensor (grey) and a engine temp sensor (green or black) The engine one often causes problems. Have you confirmed the vehicle is overheating using a diagnostic machine?

    I cant remember coming across a faulty fan unit on a TT, check that when the a/c is on that one of the fans comes on, this would most likely rule that out.

    Let me know if you would like any further advise

  • ccsr Nov 09, 2012

    New owner of 2001 TT Turbo.I did a radiator flush change all filters,change motor oil.I ran it about 50 miles with heater on the temp gauge at mid point,but neither fans came on check all 3 fueses on top of battery they are all good,thinking of changing fan relay?

  • Anonymous Mar 25, 2014

    wiring diagram for fans

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The main reason for the over heating of the audi tt is to do with the water pump. The propeller within the first type of water pumps is made of plastic. This was to prevent corrosion, however was never designed to last longer than 5 years. What you need to do is purchase the new style water pump. These new style water pumps have been designed with a metallic propellor which should resolve the overheating. Let us know how you get on.

Posted on Aug 17, 2009

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