AC readings.
Instructor
Joined: Oct 2010
Posts: 240
Likes: 2
From: Yangpyeong Gyeonggi-Do
From another post on the forum after doing a search....
"The factory manual was calling for 27 psi/ low side and 135 psi/ high side at 1,000 RPM. I finally decided that I had nothing else to lose (but a compressor) and added more R-134a to raise the pressures to about 30 psi/low side and 250 psi/high side. Ambient is about 82 degrees this morning.
I now have 42 degrees at the center vent on the driver's side and 40 degrees at the left vent on the passenger's side of the dash. The factory manual calls for 40 degrees on a perfect system."
"The factory manual was calling for 27 psi/ low side and 135 psi/ high side at 1,000 RPM. I finally decided that I had nothing else to lose (but a compressor) and added more R-134a to raise the pressures to about 30 psi/low side and 250 psi/high side. Ambient is about 82 degrees this morning.
I now have 42 degrees at the center vent on the driver's side and 40 degrees at the left vent on the passenger's side of the dash. The factory manual calls for 40 degrees on a perfect system."
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Before you just ADD a charge, Check out these post.
There’s a Chart in the service manual that provided you a pressure value for the HIGH and LOW side at various critical environmental and engine parameters.
NOTE! Recommend that you add an oil charge with your recharge. As with any R-134a leak, oil leaves the system. OIL is CRITICAL and single oil charge will not damage the system. Any extra oil in your system is stored in the receiver dryer.
Here are the AC POST that I have collected. They have some great info and provide a little training. :
-C5 AC System Service and Repairs: http://forums.corvetteforum.com/c5-g...post1570703001 ,, Rocco’s post http://forums.corvetteforum.com/c5-t...post1571637102 , Compressor Replacement: http://forums.corvetteforum.com/c5-t...-write-up.html
BC
There’s a Chart in the service manual that provided you a pressure value for the HIGH and LOW side at various critical environmental and engine parameters.
NOTE! Recommend that you add an oil charge with your recharge. As with any R-134a leak, oil leaves the system. OIL is CRITICAL and single oil charge will not damage the system. Any extra oil in your system is stored in the receiver dryer.
Here are the AC POST that I have collected. They have some great info and provide a little training.
:-C5 AC System Service and Repairs: http://forums.corvetteforum.com/c5-g...post1570703001 ,, Rocco’s post http://forums.corvetteforum.com/c5-t...post1571637102 , Compressor Replacement: http://forums.corvetteforum.com/c5-t...-write-up.html
BC
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Three things that can cause this are:
1. refrigerant is overcharged
2. air in the system
3. expansion tube is partially restricted
