AC not working

Tiny
DRRADKIN
  • MEMBER
  • 2007 CHEVROLET UPLANDER
Air Conditioning problem 6 cyl Front Wheel Drive Automatic 96000 miles

Hello, the A/C in my '07 Chevy Uplander (96,000 miles) has quit working. The A/C light inside turns on and under the hood the Compressor kicks on and seems to be running properly. The low side line is cold and the pressure (checked with one of those cheap gauges on top of a recharge can)(picture below


http://www.2carpros.com/forum/automotive_pictures/575763_GBM2CS_1.jpg

) shows at the top of the blue "filled" area. However, when I pulled the gauge off the port the refridgerant was green. Is this normal? I have had the vehicle since it had 36,000 miles on it and hasn't been serviced as far is I know.
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Wednesday, September 22nd, 2010 AT 5:37 PM

5 Replies

Tiny
DOCFIXIT
  • EXPERT
Hi to diagnose properly need to get a gauge set on system and see what high and low readings are. Look for shop in area that specializes in AC have a diagnosis done $20-$40. Then post results and will advise as to repair.

Here is a guide that will help you.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Let me know
Thanks for donate
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Thursday, September 23rd, 2010 AT 12:58 PM
Tiny
DRRADKIN
  • MEMBER
Hi, I put my (cheap) set of gauges on the system and am posting the pictures from the readings.

Low Side: +17 (I hope the makes sense)


http://www.2carpros.com/forum/automotive_pictures/575763_HPIM8401_1.jpg



High Side: +56.25


http://www.2carpros.com/forum/automotive_pictures/575763_HPIM8402_1.jpg



Any thoughts on the pressure?
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Thursday, September 23rd, 2010 AT 3:55 PM
Tiny
DOCFIXIT
  • EXPERT
Low should be @ 35psi high needs to be @200psi. Readings indicate low charge. Green is a dye placed in system to help ID leaks with use of black light.
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Saturday, September 25th, 2010 AT 1:01 PM
Tiny
DRRADKIN
  • MEMBER
I gave you the outer reading on my gauge (marked 134A) the inside marks are PSI. The High side is 210psi and low side is about 60psi. I think I figured out the problem though. It started working after I took the box around the heater core apart. I think that it isn't always directing the air around the heater when I turn the dial to the cold setting.
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+1
Saturday, September 25th, 2010 AT 7:33 PM
Tiny
DOCFIXIT
  • EXPERT
Yes blend door will cause low side to go up and not cool
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Sunday, September 26th, 2010 AT 2:27 PM

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