Having problems with your 2005 Audi A3 ?

My 2002 audi a3 1.9 tdi is overheating? I have

\015 My 2002 audi a3 1.9 tdi is overheating? I have isolated its not the water pump, the water is flowing through the car, there is no indication of head gasket problem and have changed the ECT sensor but still the problem persists. The faster I go the higher the temp gets and at times I have to drive with the air-con on high and the windows down to release some of the heat and reduce the temp. I have also noticed that the main fan has stopped working but have no been able to locate a fuse or switch for this? Please Help??\015 Posted / edited by AnonymousUser on : 26-10-2020

Answers :

The radiator fan is of no value above 35 mph due to the amount of air being forced through the radiator. Your problem appears to be with the thermostat. It's relatively inexpensive and easy to change. You should have the fan repaired for low speed and idle cooling.. It's more than likely a faulty relay, It is also a quick fix and relays are inexpensive. Good Luck, Ned
If your cooling fan is not working you solved your own problem. The cooling fan is what helps your radiator perform its function. The radiator cools down the antifreeze mixture by separating it into small tubes separated by air fins, the fins allow a greater surface area for air. The radiators main function is to dissipate heat into the surrounding atmosphere which it can do well at highway speeds without a fan, but most modern cars need a cooling fan to help pull air across the radiator.
\015\012The wiring diagram for your vehicle suggests that there is a 5 amp fuse 4 and a 40 amp fuse 42 that run the radiator fan and control which should be located in an under hood fuse/relay box. Check them with a test light on both sides, with the light to ground you should see a positive voltage at both sides. the 40 amp would most likely be a maxi fuse, or a larger size then the regular atm fuse for the 5 amp,
Repair Help & Product Troubleshooting for 2005 Audi A3

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