A/C stopped working - Help!
Thread Starter
Instructor
Joined: Dec 2013
Posts: 175
Likes: 8
From: Tuskegee Al
A/C stopped working - Help!
Today I was driving my C5 and turned on the A/C and got hot air. It was working fine yesterday but today nothing but hot air. The compressor is working and engaged but no cooling. Also no codes in the DIC. No cooling problems in the past. It just started today. Any help would be appreciated.
Thread Starter
Instructor
Joined: Dec 2013
Posts: 175
Likes: 8
From: Tuskegee Al
Update. I had a friend put gauges on the Vette and it has refrigerant in it. The compressor is engaged but it still blows hot air. Also, the lines connected to the compressor are hot. No codes in the DIC still.
Last edited by KAGEY228; Oct 16, 2018 at 02:02 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
BOTH lines cant be HOT if it working!!!
The clutch shouldn't be engaged IF, there is a LOW r-134 charge.
SO,,,,,,,,,,,,,,,,,, Somethings here doesn't add up. Are you SURE that the inner and outer parts of the pully and clutch are actually spinning as one unit. The metal lines that go to the BIG ALLUMINUM RECEIVER will be COLD if the unit is actually pumping r-134.
How are you reading the DTCs?? If the temp doors that select the HVAC temp are not moving and are stalled on HOT, you will get HOT air even if it AC is 100% PERFECT.
What were the actual pressures that you saw when the gages were connected to the HIGH and LOW side???
We need to review all the conditions and see what you actually have..
Bill
The clutch shouldn't be engaged IF, there is a LOW r-134 charge.
SO,,,,,,,,,,,,,,,,,, Somethings here doesn't add up. Are you SURE that the inner and outer parts of the pully and clutch are actually spinning as one unit. The metal lines that go to the BIG ALLUMINUM RECEIVER will be COLD if the unit is actually pumping r-134.
How are you reading the DTCs?? If the temp doors that select the HVAC temp are not moving and are stalled on HOT, you will get HOT air even if it AC is 100% PERFECT.
What were the actual pressures that you saw when the gages were connected to the HIGH and LOW side???
We need to review all the conditions and see what you actually have..
Bill
Thread Starter
Instructor
Joined: Dec 2013
Posts: 175
Likes: 8
From: Tuskegee Al
Update: I rented a set of gauges from Auto Zone because my friend's set could only connect to the high pressure side. When i connected the gauges, I had zero readings and the clutch would not engage. i added 26 ozs. of 134 and charged to a low pressure reading of 30 and a high pressure reading of 140. The internal temperature was 38 degrees. i have a leak somewhere, so I will monitor to see how things go. One of the cans of 134 had oil, stop leak and dye included, so we shall see hopefully. Thanks for all of the feedback and encouragement.
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
Just in case you need it, you may want to take a look at this Post for some details, as well as a very useful A/C Chart.
