markloughrey Posted April 14, 2012 Report Share Posted April 14, 2012 hello i have a audi 2003 a3 1.6 petrol thats over heating removed the thermostat and the car does not over heat, so i replaced the thermostat with a new one from audi , car over heats does any one no if the thermostat is opened and closed by the ecu ? thanks Link to comment Share on other sites More sharing options...
ChrisGoulding Posted April 23, 2012 Report Share Posted April 23, 2012 The thermostat is an independent unit that basically opens up when the engine coolant is hot enough. It isnt controlled by the ecu. Is it definitely overheating? Or are you just going off what it says in the dash? I had an A3 that showed 12 degrees, but had reached 70 degrees. It turned out to be the dash that was faulty. Also, the temp sender unit may be faulty and gives an inaccurate reading in the dash. Link to comment Share on other sites More sharing options...
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