Hi All, I have a 1997 Quattro a6 I live in AZ and for several years have had problems with the AC cutting off and refusing to turn back on. My Several expierments were Morning drive Temp 90 AC Perfect...Non Drive 105Temp AC finestop for lunch came out started the car temp 109-110...Ac started and after a minute the cool indicator shut off and blows hot air... I done several senarios all resulting in the ac not working after the car cabin temp reaches the 109-110 temp. as soon as the car cools off in covered parking or garage it works perfectly. this happen on the open raod on long drives as well. Any Help here would be greatly appreciated.
Indicates gas pressure and condenser cooling problems
check the condenser fan is working properly and have the gas pressures checked by gauges
check that the evaporator fins are clean and not blocked as ice build up will cause the same indications
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Emissionwiz thanks for the quick response... I have no idea what my low side pressure is. We had it serviced and I'm guessing they tested it at the Dealership they say the AC should be fine...1 month later the same problem... once, 2 years ago ,they replace the ignition switch saying there was something in the "ignition switch" that was causing the turning the ac to turn off. back then I put the car in neutral and the ac would kick on again. that trick didn't work this time. the car has to be less than 109-110 cabin temp or the AC doesn't work. I usually could restart the car or put it in neutral and it would kick on now nothing... and if I hold the ac button down it will not stay on the is something telling the ac not to allow it to switch on the car has been babied for 12 years, still only has 87k on it that it and has had all interval maint. done ... this is a stumper for Audi and I'm finding out alot of other people have the same problem. I'm prettry good with mechanics just don't have any special tools for the Audi a6.
what is the low side system pressure
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