quattro Digest, Vol 21, Issue 32
George Selby
gselby4x4 at earthlink.net
Tue Jul 19 17:22:28 EDT 2005
At 01:18 PM 7/19/05, you wrote:
>I turn off the AC for a second and hit the switch to turn it back on...NO
>AC AGAIN! But ut worked fine on the drive home and worked fine this
>morning on the drive to work. WTF? Thoughts? Would a vacuum leak have
>anything to do with this? Or my recent refill?
May be overcharged, and with extremely high temps, high side pressure
relief switch may be cutting the A/C out. On my VW Jetta, an engine temp
switch was cutting out my A/C after 10 seconds of operation, I disconnected
it, spliced the two wire together with a posi-lock, and now that car has
the coldest a/c ever. I mean bone chilling, so cold you can't run it on
recirc, and you have to add heat in, even when it's 90+ outside.
For further diagnosis, apply 12V directly to the compressor clutch, and see
if that engages the a/c unit. Also, try disconnecting each pressure switch
on the a/c lines (one at a time) and jump over the wires. If your
compressor engages, then one of the switches is either bad or indicating a
problem. You will have to do this with the engine on and the a/c switch
engaged.
George Selby
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