A/C problems
Thread Starter
Instructor
Joined: May 2006
Posts: 106
Likes: 0
From: Cary NC
A/C problems
I just recently redid my A/C unit in my car. I replaced the compressor accumulator and orifice tube. A/C is running nice and cold while the car moving but as soon as i sit at a stop light for more then 3 min my car starts to heat up and the A/C turns hot.... I have recently discovered that my catilitic converter has gone bad but havnt gotten around to fixing it yet... not sure if that has any affect... please help 
Melting Slicks
Joined: Feb 2005
Posts: 2,135
Likes: 0
From: Sebastian Florida
St. Jude Donor '06
Sounds like the compressor clutch is disengaging, drive the car and get the A/C blowing cold and then park the car, open the hood while it is running and check to see if the clutch stays engaged when it blows hot.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
If the fans are not coming on, or the condensor is dirt clogged the head pressure goes above max and the safety switches should protect the compressor from failure by cutting power to the a/c clutch.
Race Director
Joined: May 2006
Posts: 10,691
Likes: 71
From: Phoenix Arizona
Originally Posted by aminnich
If the fans are not coming on, or the condensor is dirt clogged the head pressure goes above max and the safety switches should protect the compressor from failure by cutting power to the a/c clutch.
Especially the dirt/clogged part.You can get a cheap guage at Auto Zone. Is the comp clutch on or cycling with the ac on? Is the low pressure line (big one) cold?
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Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Originally Posted by zr1fred
Especially the dirt/clogged part.You can get a cheap guage at Auto Zone. Is the comp clutch on or cycling with the ac on? Is the low pressure line (big one) cold?
Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
Originally Posted by fsufan79
yes my fan is on while my ac is on... how can i check my refidge level?
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Have had this problem on another vehicle many years ago. Hard to remember exactly what we found but the system was evacuated. The freon removed, vacuum pumped down well and freon reinstalled. Sometimes the dryer/accumulator if clogged could cause poor flow this but you said it was just changed.
Knowing what the pressures are might give a clue. You might need a pro to check this if you don’t know what the numbers should be yourself.
Please fill out your profile so we know what kind of car you have. Makes things easier and you will get more exact answers.
Knowing what the pressures are might give a clue. You might need a pro to check this if you don’t know what the numbers should be yourself.
Please fill out your profile so we know what kind of car you have. Makes things easier and you will get more exact answers.
Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
.......what did the orifice tube look like?.....was it full of trash?.......could be that you have a blockage in the system.......if you have tried everything else, you may have to remove the refrigerant, flush the system (you can use cfc-20 flush for r-12 system - unsure if can be used for 134)...........reassemble, and try again......**recheck your pressure switches in the lines..
Last edited by Da Mail Man; Aug 10, 2006 at 08:13 AM.
Thread Starter
Instructor
Joined: May 2006
Posts: 106
Likes: 0
From: Cary NC
Alright ill have my system checked and will post the pressures as soon as i can get a hold of some gauges... thanks... hopefully might b able to post later on today and i did change over to a 134 system
