Need Some Help Troubleshooting A/C
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
Need Some Help Troubleshooting A/C
My A/C has been working fine until it suddenly started blowing hot air. It was converted to R-134A years ago. I thought maybe there was a leak or it was low on refrigerant. I bought a bottle of R-134A refrigerant with the gauge and connected it up to the low pressure port on the air drier. The compressor ran briefly and then shut off. The pressure was 150psi. What would cause the low pressure side to be at that high of pressure? The FSM is of no help here.
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Get a Little wire and jump the low pressure switch. Just locate it pull it off jump it and leave it disconnected and see what pressure ur at. It might be 150 because the clutch isn't engaged and running the compressor. Don't run it that long jumpered. Maybe 15mins tops and if it goes to a real low pressure while its jumpered Its low. put some more in
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
If its a 150 with it jumpered and the compressor running do not add any because it's screwed up. Something let loose and plugged up most likely ur orfice valve/filter for starters but most likely it was a leakdown and hope for a real slow one u can't find then u can pump it up and you'll be good for another 2yrs
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
If its a 150 with it jumpered and the compressor running do not add any because it's screwed up. Something let loose and plugged up most likely ur orfice valve/filter for starters but most likely it was a leakdown and hope for a real slow one u can't find then u can pump it up and you'll be good for another 2yrs
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
There ya go I hear those low pressure switch connectors go bad a lot and if its not going lower 45 psi at about 2000 rpm its overcharged and will discharge a higher temp. You need it to pull lower to get colder
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
So bleeding off a little Freon might make it more efficient?
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
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Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
You nailed the problem. It's the connector. I've checked the Corvette parts sites but can't find one. Any ideas?
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Quick search on google got me this and their is plenty more
https://www.google.com/webhp?sourcei...ector&tbm=shop
and thanxs man no one ever says that anymore
https://www.google.com/webhp?sourcei...ector&tbm=shop
and thanxs man no one ever says that anymore
Last edited by cudamax; Jul 30, 2014 at 01:54 AM.
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
And A/C Delco replacement connectors
http://www.jcwhitney.com/ac-delco-oe...=d255y1994g2j1
http://www.jcwhitney.com/ac-delco-oe...=d255y1994g2j1
Last edited by cudamax; Jul 30, 2014 at 02:00 AM.
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
And A/C Delco replacement connectors
http://www.jcwhitney.com/ac-delco-oe...=d255y1994g2j1
http://www.jcwhitney.com/ac-delco-oe...=d255y1994g2j1