A/c not working
Thread Starter
3rd Gear
Joined: Jan 2011
Posts: 3
Likes: 0
A/c not working
If anyone would be so kind to point me to a link for a/c diagnosis. Not cooling, compressor not engaged, Auto temp control head blinking when the car is first started.
1991 vette Thanks for any and all assistance.
1991 vette Thanks for any and all assistance.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Here is a link to get you started. It may be of some help.
https://www.corvetteforum.com/techti...=193&TopicID=2
My first guess is that you are probably low on freon.
https://www.corvetteforum.com/techti...=193&TopicID=2
My first guess is that you are probably low on freon.
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
Here is a link to get you started. It may be of some help.
https://www.corvetteforum.com/techti...=193&TopicID=2
My first guess is that you are probably low on freon.
https://www.corvetteforum.com/techti...=193&TopicID=2
My first guess is that you are probably low on freon.
Last edited by CAJUN C4; Jun 20, 2011 at 11:30 AM.
Thread Starter
3rd Gear
Joined: Jan 2011
Posts: 3
Likes: 0
Thanks a BUNCH!! 
Yes the code was for low freon, guess i 
will have to convert to 134a now. Are there any conversions kits out there?
Again thanks of lot, this sure help shorten the process of diagnosis!!
Yes the code was for low freon, guess i will have to convert to 134a now. Are there any conversions kits out there?Again thanks of lot, this sure help shorten the process of diagnosis!!
Racer
Joined: Sep 2001
Posts: 266
Likes: 7
From: Sumner WA
Good Luck and stay cool!
Ron
Advanced
Joined: Jun 2009
Posts: 96
Likes: 0
From: Victoria Harbour
Duracool or redtek.
Walmart sells a kit to recharge. Ive been doing it to cars for 10 years now. No conversion.
Seriously, the stuff is GOD!
In Canada the kit is approx. $50. US is sure to be cheaper.
Walmart sells a kit to recharge. Ive been doing it to cars for 10 years now. No conversion.
Seriously, the stuff is GOD!
In Canada the kit is approx. $50. US is sure to be cheaper.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Freeze 12 is 80% R134 and I don't know of any (legitimate) shops that will put it in or even work on it if you do.
Duracool and all of the other hydrocarbon based refrigerants (which always seem to come from Canada) are specifically outlawed in 18 States; potentially explosive so if you have an evaporator leak, don't let anyone lightup (and buying it will probably put you on the Dept of Homeland Security watch list); and the same shops that won't touch Freeze 12 aren't going to monkey with this junk either.
Most 20 plus year old cars need a complete rebuild which will run you $800 to $2000. If you're worried about the cost of gas, you're worrying about the wrong thing. R12, even at $30/lb, will cost you less than $100. If you can't afford that, maybe you should consider a used Yugo.
Duracool and all of the other hydrocarbon based refrigerants (which always seem to come from Canada) are specifically outlawed in 18 States; potentially explosive so if you have an evaporator leak, don't let anyone lightup (and buying it will probably put you on the Dept of Homeland Security watch list); and the same shops that won't touch Freeze 12 aren't going to monkey with this junk either.
Most 20 plus year old cars need a complete rebuild which will run you $800 to $2000. If you're worried about the cost of gas, you're worrying about the wrong thing. R12, even at $30/lb, will cost you less than $100. If you can't afford that, maybe you should consider a used Yugo.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
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
Advanced
Joined: Jun 2009
Posts: 96
Likes: 0
From: Victoria Harbour
If it was "dangerous" Walmart would be the first to stop selling it,you would think.
Never had an issue with it, nor heard of a issue with it. I never even heard of the "outlawed" in some states? I will look into that. Thx for the info.
Each to their own i guess.
Never had an issue with it, nor heard of a issue with it. I never even heard of the "outlawed" in some states? I will look into that. Thx for the info.
Each to their own i guess.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Go here and page down to the unacceptable list: http://www.epa.gov/ozone/snap/refrig.../macssubs.html
This crap isn't sold at Walmart in the US - nor have I seen Freeze 12 in a US Walmart, but they do have tons of R134 which is 100% R134, instead of the 80% in Freeze 12 (and gee, you'd think Walmart might cheapen it up a bit).
This crap isn't sold at Walmart in the US - nor have I seen Freeze 12 in a US Walmart, but they do have tons of R134 which is 100% R134, instead of the 80% in Freeze 12 (and gee, you'd think Walmart might cheapen it up a bit).
Cruising
Joined: Mar 2011
Posts: 10
Likes: 0
From: Troy NY
find some old timers and ask them in they have any. I found a 5 gallon bucket of 12 oz R12 cans at my buddies house. I asked his dad if I could have one for my 92 vette. He said have the whole bucket. then he went and grabbed a set of guages for it and gave me that. He said he has no use for it anymore. I thought I hit gold. luckly my system still has a full factory charge. But my day will come when the compressor goes or a oring leaks. Moral of the story is ask around. it may not be as rare as you think.
6th Gear
Joined: Jun 2011
Posts: 6
Likes: 0
From: hampton nh
donot now about computers on these cars as i am new but i have a few things you can check if you have a multi meter. there should be a plug at the compressor. if all controls are calling you should have apx.12 volts. if not there is a low pressure switch that is normall closed except if you are real low on refrigerant. usually opens to break circuit to compressor at apx 20 pSIG. you would need gauges to verify pressurs. usually closes apx. 40 PSIG. you should check fuses and possibly any fusable links if applicaple.just a few things i know. hope this was helpful.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
The blinking means there's a problem and a trouble code should be stored in the CCM. It doesn't work when there's a Code. I'd guess there's no gas. Go here: https://www.corvetteforum.com/techti...=193&TopicID=2