No voltage to a/c compressor
Thread Starter
Junior Member
Joined: Jul 2008
Posts: 27
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From: Southern N.H.
Car: 1987 TA
Engine: 5.7 TPI
No voltage to a/c compressor
I have checked and tested every fuse in the block under the dash.
Guess i'll check the heat-a/c control in the dash next.
Am I forgetting to check something?
Guess i'll check the heat-a/c control in the dash next.
Am I forgetting to check something?
Senior Member
Joined: Feb 2009
Posts: 660
Likes: 0
From: N. Virginia
Car: 1988 Firebird - 1998 Z28
Engine: 2.8 - LS1
Re: No voltage to a/c compressor
im positive there is a relay somewhere under the hood. i dont know exactly where but thats when a good shop manual comes in
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Joined: Jul 2004
Posts: 2,989
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Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: No voltage to a/c compressor
Yup, a bad pressure switch (or no pressure in the A/C lines) will cause a no-power situation at the compressor clutch.
Diagram here: http://www.austinthirdgen.org/mkport...F_and_vin8.jpg
Which switch is bad? The low pressure cycling switch in the drier or the high pressure switch in the back of the compressor? The first one would be easy to replace (and they do tend to go bad often).
Lou
Diagram here: http://www.austinthirdgen.org/mkport...F_and_vin8.jpg
Which switch is bad? The low pressure cycling switch in the drier or the high pressure switch in the back of the compressor? The first one would be easy to replace (and they do tend to go bad often).
Lou
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