A/C doesnt even ATTEMPT to come on...
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
A/C doesnt even ATTEMPT to come on...
At first, it worke,d but was noisy when first engaged. Then it stopped working altogether.
I replaced the A/C clutch.
When I turn the A/C on.. nothing.
The fuse is OK.
Any suggestions?
I replaced the A/C clutch.
When I turn the A/C on.. nothing.
The fuse is OK.
Any suggestions?
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: A/C doesnt even ATTEMPT to come on... (Kale)
Was it working before you replaced the clutch? Did you set the air gap between the outer hub and the pulley at .020? System needs 50 psi of pressure for the low pressure switch contacts to close allowing juice to flow to the compressor. How cold is it? Below 50 degrees and it's going to need some engine heat for the system to get to this pressure and if the charge is low, it may never get that high. A quick test would be to momentarily jumper the low pressure switch connector with a paper clip. The switch is on the Evaporator at the firewall. If the compressor comes on, have it pressure tested.
Le Mans Master
Joined: Aug 2002
Posts: 6,080
Likes: 3
From: Clearwater FL
St. Jude Donor '06
Re: A/C doesnt even ATTEMPT to come on... (SunCr)
System needs 50 psi of pressure for the low pressure switch contacts to close allowing juice to flow to the compressor.
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: A/C doesnt even ATTEMPT to come on... (Kale)
At first, it worke,d but was noisy when first engaged. Then it stopped working altogether.
I replaced the A/C clutch.
When I turn the A/C on.. nothing.
The fuse is OK.
Any suggestions?
I replaced the A/C clutch.
When I turn the A/C on.. nothing.
The fuse is OK.
Any suggestions?
I checked the voltage from the A/C clutch connector. Nothing between the two, nothing from either one to ground. Guess it's time to get out the wiring diagrams to find out what the problem is.
[Modified by GlockLT4, 2:24 PM 2/8/2004]
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: A/C doesnt even ATTEMPT to come on... (GlockLT4)
For you Blazer, try the same thing - jumper the low pressure switch. Also, later Chevy's use a clutch plate that is pressed onto the shaft. They like to work loose so check the air gap if its noisy. If it's too wide, buy the special tool that's needed to press it back on until the gap is at .020.
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Re: A/C doesnt even ATTEMPT to come on... (brookman)
Thanks. its an 86.
tongiht im going to start frmo the control unit back and see what i can find.
The gap is too large after installing a new clutch, but I can't get it any closer :/
tongiht im going to start frmo the control unit back and see what i can find.
The gap is too large after installing a new clutch, but I can't get it any closer :/
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Racer
Joined: Feb 2004
Posts: 471
Likes: 0
From: Boston MA
Re: A/C doesnt even ATTEMPT to come on... (Kale)
This may sound stupid, but something similar happened to me(my temp adj didnt work). I would first check to make sure the push rod/wire that connects the adjuster to the main AC system. Is it OK and functioning (I believe its on a cable pulley system like the temp control......otherwise check out the Chiltons Book for some great diagrams of the system.
Are you sure its electric and not mechanical?
Are you sure its electric and not mechanical?