C5 air conditioning
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Joined: Sep 2014
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From: USA
C5 air conditioning
Hi there. My C5 has 155K. On the way south to fl my air conditioning stopped flowing cold air.
can anyone help with advice for testing the system? If it needs a Freon charge what is used for C5s. I’m in Delray Beach and tried C&S Corvette for repairs and they’re booked.
Thanks
can anyone help with advice for testing the system? If it needs a Freon charge what is used for C5s. I’m in Delray Beach and tried C&S Corvette for repairs and they’re booked.
Thanks
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Joined: Sep 2013
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From: Cape Coral, Florida
I’d check for leaks first and that the compressor is engaging before adding refrigerant…you don’t have to take it to C&S !!…any shop that does AC work should be able to handle it as long as it’s a refrigerant issue…if it’s anything else like wiring find yourself an auto electric shop.
Instructor
Joined: Nov 2021
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Most likely low refrigerant. Normally one side starts blowing warm while the other side is cold. Also your ac light will blink when it’s really low. I would recommend having a recharge with a lot of dye and buy yourself a black light and do a visual inspection after a 2-3 weeks. The two seals on the back of the compressor are very very common for leaks.
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From: Merritt Island, FL
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I also disagree with just blindly pumping fresh refrigerant into it. It may temporarily fix the warm air problem, but that refrigerant doesn't just wear out or evaporate over time-- it got out somehow. Any new refrigerant will just get out the same way and OP will be right back where they started.
I suggest getting a can or two of R134a that has UV dye in it. It will still leak out eventually, but the UV dye will allow for either OP or an AC shop to find and correct the leak. The C5 air conditioning system isn't cosmic and doesn't require any kind of specialized AC shop to diagnose and properly fix. Pretty much any competent shop that does AC work will be able to properly handle the job.
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Today
Thanks. your all right.The problem had to be diagnosed and repaired.
I took it to the dealer. Extremely knowledgeable. The leak? Beware C5 drivers. The lines wearing holes thru are crossed and the low side aluminum line that crosses the high side insulated aluminum high side line at under heater hoses between the exhaust manifold and fender liner&battery shield.
I’m shopping for the low side aluminum line. Again thanks
I took it to the dealer. Extremely knowledgeable. The leak? Beware C5 drivers. The lines wearing holes thru are crossed and the low side aluminum line that crosses the high side insulated aluminum high side line at under heater hoses between the exhaust manifold and fender liner&battery shield.
I’m shopping for the low side aluminum line. Again thanks
Last edited by km60sb@yahoo.com; Mar 10, 2022 at 03:35 PM.
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Most likely low refrigerant. Normally one side starts blowing warm while the other side is cold. Also your ac light will blink when it’s really low. I would recommend having a recharge with a lot of dye and buy yourself a black light and do a visual inspection after a 2-3 weeks. The two seals on the back of the compressor are very very common for leaks.
Le Mans Master
Joined: Aug 2005
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From: Merritt Island, FL
You're correct about different temps side to side, but I think this is a more common symptom on the electronic climate control cars than the non climate controlled cars. Going by memory here, so not 100% sure, but at least 90%, lol!! The 2 seals on the back of the compressor were the major leaks in my system. The high and low port Schroeder valves were also leaking. High side was junk, low (fill) side was actually coming loose!! It could also be the actuators going bad, but I think youre right on the low R134 level......
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It is more common in the electronic climate control cars because there's effectively 2 evap cores in series. The pass side evap core receives refrigerant first, then the driver side. With a low refrigerant charge, the heat carrying capacity is reduced, and by the time the refrigerant reaches the driver side evap core, it's warm and unable to absorb additional heat.
Le Mans Master
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Thank you for the explanation!! Now I know why this happens. Care to elaborate whether or not the climate systems have 2 small heater cores for the opposite effect? Or is this handled by just a single core and the actuators/air dams? Sorry for the hijack, but thought this was useful info.....
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Melting Slicks
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Is the ac switch making good contact mine threw a code with the pressure switch unhooked but on a 2007g6 i thought the freon was low but was at 50lbs and had wiggled the ac pressure switch and the ac started functioning again. Had already wasted a 5$ can of freon trying to recharge it.