A/C won't stop & condenser frozen! Help - Chevy Impala SS Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old 10-14-2016, 08:08 PM Thread Starter
Senior Member
 
Blue Dameon 33's Avatar
 
Join Date: Mar 2009
Location: Summerfield, FL
Posts: 345
 
A/C won't stop & condenser frozen! Help

So today I was heading home from work with the A/C on most of the way and I noticed something very odd when I came to a red light. The cars RPM's got really low. The light turned green and when I took off, the more I gave her gas, the lower my RPM's got to the point that she started to bog down and felt like she was going to die. I heard some loud back fire pops too as I gave it more gas. I let go of the gas, turned off the A/C and it seemed as though everything went back to normal....for the most part. When this was happening, I had the A/C set to about 3 (not full blast but one notch under). But here's where it gets crazy again; since I turned off the A/C, I went ahead and rolled the windows down till I got home (about 30min) but I kept feeling cold air hitting my feet and coming from the defrost vent on the dash. The A/C is off but it's coming out very slow and cold. When I got home I popped the hood and my condenser (the C02 looking thing) was completely frozen with a thick layer of ice as well as the lines coming to and from it. My A/C clutch was also still spinning as though it was on but it was off. I turned off the car and that's when it finally stopped. Can anyone tell me what's going on? Any clue as to what I need to do to fix this? Any help would be great!! Thanks.
Blue Dameon 33 is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 10-14-2016, 09:06 PM
Senior Member
 
jayoldschool's Avatar
 
Join Date: Jan 2001
Location: the Great White North
Posts: 5,704
 
To start, simply unplug the connector on the accumulator. The big silver can thing. That will disable the compressor.

Old cars, just like classic rock... 60s, 70s, 80s, and 90s!
jayoldschool is offline  
post #3 of 16 (permalink) Old 10-14-2016, 09:33 PM
Senior Member
 
Fred Kiehl's Avatar
 
Join Date: Feb 2009
Location: Largo, FL 33774
Posts: 10,868
 
The compressor clutch may be locked up. You can remove the belt and try turning the pulley by hand. You can also unplug the compressor itself. It may be low on refrigerant. I am not totally versed on AC systems, so I would probably take it to an AC shop for an evaluation. You can still do your own work if you want to.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
Fred Kiehl is offline  
 
post #4 of 16 (permalink) Old 10-15-2016, 08:03 AM Thread Starter
Senior Member
 
Blue Dameon 33's Avatar
 
Join Date: Mar 2009
Location: Summerfield, FL
Posts: 345
 
Jayoldschool- I will try this and see what happens.

Fred Kiehl- The clutch is turning and running fine. It's actually new by a few years. What I noticed is that even when I turn the A/C off in the car, the clutch is still spinning as though it's on. I can even still feel the cold air coming out from my feet and defrost vent on the dash. I can't upload a pic for some reason or else I would show you what I'm talking about under the hood.
Blue Dameon 33 is offline  
post #5 of 16 (permalink) Old 10-15-2016, 03:37 PM
Senior Member
 
Fred Kiehl's Avatar
 
Join Date: Feb 2009
Location: Largo, FL 33774
Posts: 10,868
 
There is a relay on the relay bracket at the rear right of the engine bay that controls the AC clutch (91-93). A 94-96 relay is in the fuse block. It may be stuck. The other option is the HVAC control module. If the on/off switch is not working it will keep the relay engaged (demand circuit). Check the voltage for the relay coil. If it is always on, it is probably the HVAC control panel.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
Fred Kiehl is offline  
post #6 of 16 (permalink) Old 10-15-2016, 07:23 PM Thread Starter
Senior Member
 
Blue Dameon 33's Avatar
 
Join Date: Mar 2009
Location: Summerfield, FL
Posts: 345
 
Good thought! It crossed my mind that the control that turns on and off the A/C may have gone bad or something. Today I started the car and let the A/C actually run on low for a bit to see what the accumulator would do and after about 5-10 min just sitting in the driveway, the car stalled. My dash lights came on and everything (as far as radio and interior lights stayed on) but the car was dead. It started right back up just fine until the second time when the Pass key Fault light came on and wouldn't let me start her at all for about 5min. I don't know what's going on!
Blue Dameon 33 is offline  
post #7 of 16 (permalink) Old 10-15-2016, 10:45 PM
Senior Member
 
Fred Kiehl's Avatar
 
Join Date: Feb 2009
Location: Largo, FL 33774
Posts: 10,868
 
The dash lights always come on when the engine stalls. No big deal.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
Fred Kiehl is offline  
post #8 of 16 (permalink) Old 10-15-2016, 10:53 PM Thread Starter
Senior Member
 
Blue Dameon 33's Avatar
 
Join Date: Mar 2009
Location: Summerfield, FL
Posts: 345
 
Why did it stall though with the A/C on? It happened again when I had the car idealing for about 2min and when I turned the A/C on, boom the car stalled.
Blue Dameon 33 is offline  
post #9 of 16 (permalink) Old 10-16-2016, 01:12 PM
Senior Member
 
jayoldschool's Avatar
 
Join Date: Jan 2001
Location: the Great White North
Posts: 5,704
 
The compressor is seizing. Stop turning on the AC. Unplug the connection I told you about. Start planning for a compressor replacement.

Old cars, just like classic rock... 60s, 70s, 80s, and 90s!
jayoldschool is offline  
post #10 of 16 (permalink) Old 10-16-2016, 05:57 PM Thread Starter
Senior Member
 
Blue Dameon 33's Avatar
 
Join Date: Mar 2009
Location: Summerfield, FL
Posts: 345
 
The compressor is turning though. It seems to be working fine as far as I understand it to work. Would not "seizing" mean that the compressor wouldn't move? My concern is that with the A/C on or off, it seems to continue to spin. I unplugged the electrical connectors that's on the side of the accumulator like you said but it didn't seem to do anything. I even opened the fuse box there next to it (up by the firewall) and removed the A/C compressor fuse but again it didn't seem to stop the compressor nor do anything else. I didn't notice this today, I started the car and with the hood up and A/C off, I noticed the accumulator started getting frozen within 2-3min including all the lines. I then turned on the A/C and instead of stalling like it did yesterday, the air came out very cold and the accumulator started to defrost. My compressor is somewhat new. It was installed about 4yrs ago BUT my A/C system only started working since February of this year. I had a few lines that had rusted holes in them so I never had a/C. In February the accumulator, lines and a few other things were replaced and since this everything has been good till now.
Blue Dameon 33 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome