ac compressor ?
 

99 tahoe 5.7
if someone can help that would begreat
my ac was on when i parked my tahoe and when irestartedit 3 hours later it was not working .
1 .fuse's are good
2 relay was the same as fuel pump so i switched the 2---- no change
3 took the control cluster out and it looked to have a greasy resido coming outof the bottom of the fan speed and temp knobs openings
4 it did not smell burnt ?
the compressor does not run but you can turn it with your hand
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so my ? is can you pull the the wiring harness off the top of the compressor up front by the pull and test there to see if its the controlls or compressor
it showed no volts with it on or off

RE: ac compressor ?
 

I assume the fan runs,just no compressor?...probably the cycling switch on the drier...try tapping on it and see if she engages

RE: ac compressor ?
 

correct the fan works just no compressor

RE: ac compressor ?
 

if it has not suddenly lost all its freon,then its probably that switch...as stated...idle it,a/c on...then tap it...see if she comes on...
if not,try unplugging the switch and jumping it with a paper clip...see if she comes on AND cools....if it comes on but does not cool,its pobably out of freon

RE: ac compressor ?
 

thanks alot Argon
i will try that and post out come

RE: ac compressor ?
 

so here we go again
i shorted across and it come on.so i plugged it back in and added a few ounces and it came and cooled it slightly.
my wife remined me that i had a muffle replaced the day before and maybe they......which i hope what i am thinking is notwhat happend.
o wait i found a leak on top of the compressor on thehigh side port. low side has a shrader valve high side has a chrome ball of shorts.
what seals this and it looks like i can replace this is this correct?
thanks for you help

RE: ac compressor ?
 

yes,you can replace that valve..the hi-side port...make sure both caps are there as well