doyley196

Many Thanks to everyone for advice. The problem was a faulty pressure sensor on air conditioning side. Thank You very much.

HELP!!!!! From one very frustrated Audi owner. I have a Audi A3 TDI Sportback, 2008. I have just had the A3 put on a diagnostic check to be told that the system is showing "healthy". The big problem is that both radiator fans run a full speed as soon as you put the keys into a on position. Both fans do however switch off when you take keys out. Also the air con will not operate - I have been told this is because one of the fans is controlling air con and it's getting a control from ecu not to operate. "Is this correct?" So here's the general history of fault; The particulate filter warning light came on, as per instructions in manual I took it down the motorway at 2000rpm in 4 gear until warning disappeared. Next time this happened I was given a tip just to park up in a quiet street and idle the engine at 2000rpm - shouldn't have listened! That's when the radiator fault appeared. Before anyone ask's - Here's what i've paid for so far. 2 new radiator fans because Audi mechanic said he'd checked the thermostat, ecu, wiring for loose joint etc. The problem is still there even after changing both radiators at a expensive cost to myself. Anyone had this problem or could someone point me in the right direction. Thanks.