Weird air conditioning issue - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 07-30-2016, 02:31 AM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2016
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
zcostilla is on a distinguished road
Default Weird air conditioning issue

I had two problems, and I believe one is fixed and the other has me scratching. Background: driving my 'burb, the A/C wasn't keeping up with the St Louis heat and humidity...well, mostly the heat. Refrigerant pressure was on the low end of good, and after a shot of 134 with some sealant, the rear blows ice cold. However, the front (dual-zone) does not.

I had suspected the door actuator because there have been a couple times when it had a kind of its own, and maxed the heat regardless of its setting, even though it was only once or twice. But that doesn't explain the passenger zone. While the rear blows ice cold, the front zones are mediocre at best, and inadequate at 90+ degrees (not to mention humidity over 70% at times). I pulled the dash to check the driver'* side actuator, and it wants to turn continually, so I am going to replace it (I count it fixed because it appears to be an easy install). But even when I manually turn the A/C door by hand to each extreme, the heat works perfectly, but the cold is still pathetic.

So I'm stumped, an I'm hoping someone else can give me some advice.

Zac
zcostilla is offline   Reply With Quote
Old 07-30-2016, 11:55 AM   #2
Senior Administrator


Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Elmira, NY
Posts: 15,303
Thanked 895 Times in 718 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

I wonder if you clogged your expansion valve with the stop leak. I don't know why they sell that crap.
Mike is offline   Reply With Quote
Old 07-31-2016, 05:55 AM   #3
Junior Member
Thread Starter
 
Join Date: Jun 2016
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
zcostilla is on a distinguished road
Default

Quote:
Originally Posted by Mike View Post
I wonder if you clogged your expansion valve with the stop leak. I don't know why they sell that crap.
They sell it to gullible home mechanics like me, I guess. I'm guessing that this is probably beyond my own abilities because of the HVAC certifications needed. Or is there something that a regular home mechanic can do?
zcostilla is offline   Reply With Quote
Old 07-31-2016, 07:46 AM   #4
Senior Member
True Car Nut
 
rjolly87's Avatar
 
Join Date: Jun 2003
Location: Las Cruces, NM
Posts: 6,611
Thanked 226 Times in 183 Posts
rjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud ofrjolly87 has much to be proud of
Default

You can get a full gauge set and work on the A/C yourself, but it requires specialized skill and knowledge. If you don't have any idea what'* going on it may be best left to the pros. It can veey easily ruin your day if you make a wrong move.
rjolly87 is offline   Reply With Quote
Old 08-01-2016, 06:29 PM   #5
Senior Administrator


Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Elmira, NY
Posts: 15,303
Thanked 895 Times in 718 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Quote:
Originally Posted by rjolly87 View Post
You can get a full gauge set and work on the A/C yourself, but it requires specialized skill and knowledge. If you don't have any idea what'* going on it may be best left to the pros. It can veey easily ruin your day if you make a wrong move.
Which he already did. Now he will have to recover the system, disconnect lines from the compressor, flush the entire a/c system with a/c flush, replace the receiver drier and replace the expansion valve. Then refill the system.

Several hundred just in that project alone.
Mike is offline   Reply With Quote
The Following User Says Thank You to Mike For This Useful Post:
WilliamE (08-02-2016)
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
weird weird and really weird 3064datazz 1992-1999 42 07-19-2007 02:03 PM
air conditioning r12 or r134? 94bonnyV 1992-1999 3 07-07-2003 09:35 PM
Anyone changed air conditioning compressor? coopsse 1992-1999 6 06-22-2003 09:05 PM
Air Conditioning 94bonnyV 1992-1999 2 05-08-2003 04:48 PM
Air conditioning Blk_Bonneville 1992-1999 4 08-11-2002 04:10 AM


Tags
a/c, air conditioning, dual-zone

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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 10:09 PM.