AC light on
Thread Starter
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,433
Likes: 3,981
From: Cape Coral, Florida
AC light on
My 01 with dual climate control has the AC light on even with 80 degrees set into the controls on a 50 degree day when it's in Auto. I also confirmed that the AC clutch is engaged when this occurs. The defrost is NOT selected either...when I turn the AC light off it kicks the climate control out of auto into manual operation...I read the owners manual front to back on the AC system and can't figure out why this is happening...any help out there anyone ??
Safety Car
Joined: Feb 2001
Posts: 3,725
Likes: 53
From: Warrington Pa.
It will do it and you Don't have a problem. The system puts the AC on even if it requires heat, as I said it removes the moisture ......you don't have a problem.
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
And looking at the schematics etc in the FSM, just because the button light is on doesn't mean the compressor clutch is engaged: that's controlled by a pressure switch as well as the control unit, with some additional inputs from the PCM.If the clutch is working (i.e. it disengages when you switch the A/C off manually), but it stays on all the time otherwise, you may be low on refrigerant and it's not getting to the high-pressure cutoff limit.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Thread Starter
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,433
Likes: 3,981
From: Cape Coral, Florida
Thanks Bill,
Like I said it switches on and off (AC light on and off) when manual mode is selected and I verified this looking at the compressor clutch but always on in auto even if heat is selected I guess I'll check the refrigerant level !!
Like I said it switches on and off (AC light on and off) when manual mode is selected and I verified this looking at the compressor clutch but always on in auto even if heat is selected I guess I'll check the refrigerant level !!
Thread Starter
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,433
Likes: 3,981
From: Cape Coral, Florida
Guessing from your remark I'd say you probably weren't even born yet or you were busy riding your Stingray.....with a banana seat...LOL !!!...my last GM product was a 1972 Z-28 Camaro... Enough said !!!
Administrator
Joined: Mar 2001
Posts: 367,772
Likes: 24,683
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
At least now you know there is nothing wrong with your HVAC unit. 