Audi

Hi

On my old A6 2,6 1996 the AC gives me to errors (and NO cooling)

On the AC ECU display I can read out an error 15.7 which means that "Air
Flow Flap Motor V71" has been sporadic blocked and I also can read an error
(in channel 52) saying "A/C Refrigerant Low Pressure Switch - F73"

With a VAG-tester I can read out error 1274 which is the Flap Motor error (I
dont read erro r802 which should be the Low Pressure Switch, but this could
be due to a malfunction in my home-build tester !!!. I can reset the
1274-error and then the ECU display only says one error - the "A/C
Refrigerant Low Pressure Switch - F73"

After a couple of days the "Flap Motor" error is back again.This error could
have been there for a long time because I have never before diagnosed the AC
and it has been working including cooling for last 2½ years without any
problems until last weekend :-((

1) I'm more or less sure that the the fluid is gone - because the system
does not want to start the compressor - this corresponds with the "A/C
Refrigerant Low Pressure Switch - F73" error. Next week I'll have the system
loaded with Refrigerant - and maybe its then ok or there is a leakage some
were.

2) What does this "Air Flap" do? (its not mounted on US/Canada cars
according to what I can read!!). Were is it located ?

Best regards
Jens