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Audi A3 Year 2003 1.6Litre Radiator Fans not Working

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Audi A3 Year 2003 1.6Litre Radiator Fans not Working

Old 01-18-2019, 06:21 PM
1st Gear
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Join Date: Jan 2019
Posts: 3
Default Audi A3 Year 2003 1.6Litre Radiator Fans not Working

Stuck in traffic the temperature Gauge went up from the set 90 Degrees Centigrade to about 104 Degrees Centigrade.
Checked the fuse which sits on top of the battery compartment - Found it was pitted & burnt on one end due to arching, cleaned the contacts using emery cloth. Re inserted the fuse the fans came back to life with the A/C on and when the temperature went above 103 Degrees Centigrade.

After a few days the fans stopped working, all the fuses are ok.
I have been looking at the Circuit diagram of the A/C unit which is linked to the radiator fans and cannot find the radiator control switch. The only switch I think I found has 2 poles as this is located on the left side of the radiator right at the bottom.
When I remove the plug to the sensor / switch the fans kick in. So Im not too sure if this is the radiator fan control switch ? I tried shorting the 2 contacts but the rads do not kick in but on unplugging the unit the radiators kick in.

Before I start looking into the A/C Radiator fan control unit I wanted to carry out some fault finding.

Could someone please advise where I can find a three pin radiator control switch for an audio A3 2003 model 1.6 to progress with testing?



Last edited by Cruiser_a3; 01-18-2019 at 06:25 PM. Reason: made a mistake
Old 05-06-2019, 03:01 PM
KilBoyPwrHd's Avatar
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Join Date: Oct 2018
Location: Cape Town ZA
Posts: 12

I had the Same issue with my 1.8, the fan controller is situated under the battery bolted to the sub frame, it should have a part number on it, replace that and it should solve the issue.
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