a/c loses charge - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-25-2010, 11:56 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2009
Posts: 51
Thanks: 0
Thanked 0 Times in 0 Posts
gary0326 is on a distinguished road
Default a/c loses charge

i own a 92 bonneville se.
everytime i charge my a/c. it loses its charge right away. what should i look at?

also just out of curiously how much did my car cost when they first came out i cant find it online?
gary0326 is offline   Reply With Quote
Old 04-26-2010, 12:06 AM   #2
-- SITE DONATOR --
True Car Nut
 
ymmot04's Avatar
 
Join Date: May 2009
Posts: 4,638
Thanked 5 Times in 4 Posts
ymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of light
Default

Have you been recharging it yourself? If so, does your filler have a gauge? Does it hold any with the engine off, or does the can drain and you never get any pressure?

If it is leaking out that fast you should be able to see or hear the leak. If you fill it and start it with the A/C on then look under the hood, you will probably see a hole or loose fitting somewhere.
ymmot04 is offline   Reply With Quote
Old 04-26-2010, 12:10 AM   #3
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2009
Posts: 51
Thanks: 0
Thanked 0 Times in 0 Posts
gary0326 is on a distinguished road
Default

yes i recharge it myself. itll feel cold when i put it in then the next time it doesnt get cold. i honestly dont know. my dad said something about putting some kind of dye in with it to see where it leaks but i think its more then that because no i cant hear it leaking
gary0326 is offline   Reply With Quote
Old 04-26-2010, 12:14 AM   #4
-- SITE DONATOR --
True Car Nut
 
ymmot04's Avatar
 
Join Date: May 2009
Posts: 4,638
Thanked 5 Times in 4 Posts
ymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of light
Default

So you have checked with a gauge and it has lost pressure? You want to make sure before you rule out other possibilities. Also want to make sure it is not to full.
ymmot04 is offline   Reply With Quote
Old 04-26-2010, 12:17 AM   #5
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2009
Posts: 51
Thanks: 0
Thanked 0 Times in 0 Posts
gary0326 is on a distinguished road
Default

what would happen if it was too full?
gary0326 is offline   Reply With Quote
Old 04-26-2010, 12:22 AM   #6
-- SITE DONATOR --
True Car Nut
 
ymmot04's Avatar
 
Join Date: May 2009
Posts: 4,638
Thanked 5 Times in 4 Posts
ymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of lightymmot04 is a glorious beacon of light
Default

I'm pretty sure to much pressure can damage/lock up the compressor. I'm sure it can do other things as well. Check the pressure, usually the gauge will have a green zone that you want to be in.
ymmot04 is offline   Reply With Quote
Old 04-26-2010, 12:23 AM   #7
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2009
Posts: 51
Thanks: 0
Thanked 0 Times in 0 Posts
gary0326 is on a distinguished road
Default

ok. well next time i recharge it ill look at it
gary0326 is offline   Reply With Quote
Old 04-26-2010, 12:41 AM   #8
Senior Member
True Car Nut
 
rjolly87's Avatar
 
Join Date: Jun 2003
Location: Las Cruces, NM
Posts: 6,857
Thanked 298 Times in 246 Posts
rjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant future
Default

Assuming it is losing pressure, and not overcharging, you will likely want to use something like this:

http://www.autozone.com/autozone/cat...randName=Quest

What will happen is the dye will fluoresce under uv light and will be unmistakable, and you will have found your leak. If a overpressure situation is happening, there is a high pressure switch that supposedly kills the compressor, much like the low pressure switch. But if that was the case, charging it would likely make the problem worse, and the compressor would run less than it did even before, and that doesn't sound like the case.

One dumb issue I had a problem with was valves. Make sure they are not leaking. I could tell it was my problem by charging, and then filling the valve with water, and I could see bubbles. Spraying soapy water all over the place could do the trick also, but is like a brute force method, takes time, but is a cheap troubleshooting tool.
rjolly87 is offline   Reply With Quote
Old 04-26-2010, 01:23 AM   #9
Senior Member
True Car Nut
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

I've recharged my A/C system and troubleshooted it a couple of times.

Double check all of the fittings first. No point in buying Dye to fill your system if the problem is rather simple. This sounds like a dumb idea especially if you've fixed your A/C system before, but it happened to me. I replaced all of the seals, the valves, the canister, the orifice tube, and refilled the system. 1 year later (two days ago), I wanted to use the A/C for the first time and it wouldn't come on. The whole system was empty with a pressure of 0. I filled it up and I instantly heard the hissing sound of the leak, which happened to be the fitting right next to the valve. It was so loose you could turn it by hand, and I know I tightened it the first time I did this job.

If that doesn't work, buy the UV dye and use that in the system first. The dye can is pressurized, and if the leak is that large, you should be able to locate it instantly. As mentioned, the color is unmistakable. Mine is a very bright neon green.

If you find that there'* a leak somewhere at a fitting that'* already tight, you'll want to pick up an o-ring kit to replace all of the seals. While you're at it, replace the orifice tube, which is around $1 and gets clogged often, and replace the high and low side valves. Those are fairly cheap to replace.

Not sure how Bonnevilles are as I only did this job on my Regal, but you should be able to use just two conventional cans of straight refrigerant (not the larger and taller refill cans). You'll want your pressure to be between 30 and 40 psi while the A/C is running.
xtremerevolution is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
'98 SLE loses power around corners. '98 SLE - Dudley 1992-1999 14 04-20-2010 11:01 PM
92 SSE loses power even with pedal to floor. mum1218 1992-1999 3 03-29-2007 05:14 PM
98 3800 loses coolant Jim98SSEI 1992-1999 4 08-27-2006 07:00 PM
Jerk loses speaker cover in front passenger door! Turbo5 1992-1999 7 06-07-2006 05:16 PM
radio loses volume willsbonnie Audio (and aftermarket electronics) 8 12-21-2003 02:05 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:09 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.