RE: V8 A/C problem

["Buchholz, Steven" <Steven.Buchholz@kla-tencor.com>]

The C/C computer detected a fault of some sort ... you can read codes out of
the C/C from the A/C Head.  I checked the V8 service documentation ... which
said that there were a few faults that cause the outside temp light to flash
for 1 minute.  

*	one or both interior temperature sensors have incorrect values
*	both outside temperature sensors have incorrect values
*	The servomotor feedback potentiometer giving bad values or flap is
in the wrong position
*	Compressor off - the high pressure switch has operated at least 8
times, so the compressor has been shut off.

The document said that if the compressor has been shut off it can be
reactivated by turning the system off and back on again.  The fault codes
are read back from channel 1 [hold down outside temp button and push "OFF"
button to activate diagnostics ... temp up and down buttons switch
diagnostic channels].  Channel 1 fault codes:

00 - No fault
01 - Instrument cluster temp sensor (G56) - open
02 - Instrument cluster temp sensor (G56) - short circuit
03 - Evaporator temp sensor (G57) - open
04 - Evaporator temp sensor (G57) - short circuit
05 - Ambient temp sensor (G17) - open
06 - Ambient temp sensor (G17) - short circuit
07 - Servomotor feedback potentiometer - open
08 - Servomotor feedback potentiometer - short circuit
... there are more codes, but I ran out of time at lunch to write them down
... let me know if it is a code greater than 8 and I'll look it up for you
...

HTH!
Steve Buchholz
San Jose, CA (USA)
> ----------
> 
> While driving home last night, and while out over lunch today, the A/C
> started to blow warm air.  While this was happening, I noticed that the
> outside air temp light was blinking.  I turned the A/C off and back on,
> and
> the A/C started working again. Anyboby HTH, and what might the problem be.
> Low refrigerant, sensor?
>