ac has not power
Thread Starter
8th Gear
Joined: Sep 2010
Posts: 8
Likes: 0
From: kilgore tx
ac has not power
I have a 98 c5 and I'm about to pull all my hair out trying to figure out whats going on with my air condition stop working,,,,no power... checked all fuses and had control unit checked... all passed....control unit lights up but nothing happens when power button pushed. Can anyone help?
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,074
From: Wisconsin
Thread Starter
8th Gear
Joined: Sep 2010
Posts: 8
Likes: 0
From: kilgore tx
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,074
From: Wisconsin
A fully charged battery should be 12.6 volts at the terminals. Your 15v must be the gauge showing alternator output.. With all those codes I would first make sure battery is fully charged(trickle charger) and then move on from there. New batteries aren't always fully charged. I discovered early on with these cars, low voltage raises havoc with the electronics.
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
Looking at your posted codes and then reading up on the ones posted, they're all over the place. Some related to traction control, ABS, etc but the one that sticks out is the HVAC No Comm. Without communication to the HVAC head unit, nothing will happen when you push a button, just like you said. It would appear from the posted codes that you have a bad or loose connection somewhere in the system. Could possibly be a bad head unit. I'd start by checking the grounds and also checking fuses 18 and 27 in the passenger foot well.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
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
Thread Starter
8th Gear
Joined: Sep 2010
Posts: 8
Likes: 0
From: kilgore tx
Looking at your posted codes and then reading up on the ones posted, they're all over the place. Some related to traction control, ABS, etc but the one that sticks out is the HVAC No Comm. Without communication to the HVAC head unit, nothing will happen when you push a button, just like you said. It would appear from the posted codes that you have a bad or loose connection somewhere in the system. Could possibly be a bad head unit. I'd start by checking the grounds and also checking fuses 18 and 27 in the passenger foot well.
Race Director
Joined: Jul 2007
Posts: 17,729
Likes: 1,210
From: Aiken, SC
St. Jude Donor '13 thru '26
Good Luck!
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
https://www.corvetteforum.com/forums...tion-long.html Check your battery connections first then go from there. You're fixing to get intimate with your C5.