Possible A/C Problem Solution
Instructor
Joined: Mar 2005
Posts: 151
Likes: 1
From: Green Bay WI
My dealer contacted GM and this is what they've come up with....
At the factory they were putting 1.4 pounds of freon in the air conditioning system. The proper amount of freon (they have now discovered) is 1.1 pounds. The higher amount of freon resulted in too high of pressure in the system, which resulted in the disengaging of the system.
They reduced the freon in my system and the A/C is working properly now. Apparantly GM will be putting a new sticker on vehicles produced regarding freon levels, and in their opinion the problem has been solved.
I told the dealer I would post this out there as many of us have had the problem. I hope this helps at lease a few of you!!
Mike
At the factory they were putting 1.4 pounds of freon in the air conditioning system. The proper amount of freon (they have now discovered) is 1.1 pounds. The higher amount of freon resulted in too high of pressure in the system, which resulted in the disengaging of the system.
They reduced the freon in my system and the A/C is working properly now. Apparantly GM will be putting a new sticker on vehicles produced regarding freon levels, and in their opinion the problem has been solved.
I told the dealer I would post this out there as many of us have had the problem. I hope this helps at lease a few of you!!
Mike
Drifting
Joined: Jan 2005
Posts: 1,827
Likes: 301
From: Tucson Arizona
St. Jude Donor '08
I am having all the above problems here in 100+ Tucson. I just contacted a local auto air conditioning specialty shop that I have recently had dealings with on another car, and relayed my symtoms and the above GM cure regarding dropping from 1.4 to 1.1. He told me that as soon as I told him the symtoms, he was thinking that the system might be over-charged with 134a (freon). He also said the cure is discharging the system and refilling - that the refill must be exact. Charge $85 - now I must decide if it is worth saving $85 to have Chevrolet do it.
Instructor
Joined: Mar 2005
Posts: 151
Likes: 1
From: Green Bay WI
Originally Posted by Rob4092xx
Just thought of this.....will the A/C get as cold as it was originally intended to without the max amount of freon?
It was 94 degrees in Green Bay today... and it was the first day my A/C actually worked. It was blowing mighty cold air, and the good news is it KEPT blowing cold air the entire ride home!!
From what I was told, 1.1 is the correct amount of freon charge, so it's not an "undercharged system" at that level.
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by Rob4092xx
Is there a "quick fix" for this so I don't have to go to the dealer?
In other words, can I simply let a little of the freon out?
In other words, can I simply let a little of the freon out?
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Originally Posted by Rob4092xx
Just thought of this.....will the A/C get as cold as it was originally intended to without the max amount of freon?
Drifting
Joined: Sep 2004
Posts: 1,835
Likes: 295
From: Phoenix AZ
Originally Posted by Larry B.
Acutally it may get colder. Lower pressure equates to cooler discharge temp. (to point of no return). The temp of the evaporator should be ABOVE 32deg,F so it won't freeze up with ice. So it is a delicate balance between too high head pressure or too low evaporator pressure. R134a is a lot more sensitive to the correct amount being serviced than the older R12. I ran R134a in my old 69 with no problem but the trick was to get the EXACT correct amount (pressure).
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Instructor
Joined: Nov 2003
Posts: 243
Likes: 8
From: San Antonio TX
I printed this discussion and took it to my local dealer as I had the same problem. They found nothing wrong but replaced the part based on this thread. It seems to be working correctly at this time.
Instructor
Joined: Mar 2002
Posts: 124
Likes: 12
From: California
Hello.
HAVE A PROBLEM!, My C5 has been serviced several times in the past year for having a/c issues. The driver side blows hot but passenger side blows cold. I have replaced the compressor, dual climate head unit, lines, senors, etc. etc. But to no avail. I also sometimes experiance a LOUD escaping of gas when I turn the a/c on. Im at my last hope, i figure if you guys havent experienced it then I surrender.... but any info what u think please post.
HAVE A PROBLEM!, My C5 has been serviced several times in the past year for having a/c issues. The driver side blows hot but passenger side blows cold. I have replaced the compressor, dual climate head unit, lines, senors, etc. etc. But to no avail. I also sometimes experiance a LOUD escaping of gas when I turn the a/c on. Im at my last hope, i figure if you guys havent experienced it then I surrender.... but any info what u think please post.
Pro
Joined: Apr 2001
Posts: 672
Likes: 1
From: Scottsdale AZ
We have just gone through this situation. Car would go from full hot to full cold, then back again. Any slow traffic and systwm would go full hot to try and reduce high pressures. If you stopped the car and then restarted it would run full hot to reduce high pressure and then run normally until temps or pressures went back up.
Pressure switch was replaced and problem has gone away.
For those in Phoenix area, contact Armand Slason at Legends Cadillac and he will get Danny on the problem and get it solved!
480-368-6854 direct line
Pressure switch was replaced and problem has gone away.
For those in Phoenix area, contact Armand Slason at Legends Cadillac and he will get Danny on the problem and get it solved!
480-368-6854 direct line
