Need A/C Help

si83gt · #1 06-12-2007, 08:05 PM

My A/C has not been running correctly. I checked the system, and it showed that it was low. I added R-134, and it got cooler, but not very cold. Only about 60 degrees at best. I decided to get a set of manifold guages, since I wanted to make sure I was doing things correctly, and this is what I found.

Static pressure-
Low- 35psi
high- 45 psi(that is not a typo)

System running test- (after 15 minutes of running the system)
low side- 45 psi
high side- 95 psi

I believe the high side should be around 200 psi. If that is correct, then something is way off. There must be a high side restriction. Could this be an orifice tube malfunction? If so, why would it fail, and where is it located? Basically I want to know why it failed, in case it is a prelude to something else going bad. I realize with the system being low to begin with, there is a leak, and I will run dye through it and fix that also.

Any ideas??

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torkum · #2 06-12-2007, 08:13 PM

How are you using the gauges? Try reading with the high side closed at the manfold. Open the high side valve for a couple of seconds then close it. Tell us if there is any difference in the readings. How much frig did you add? WHY DID YOU REPOST???

projectSHO89 · #3 06-12-2007, 08:47 PM

Sounds more like he's running it with BOTH manifold valves open.......

Static pressure must be the same on BOTH sides. That's why it's called the static pressure.

BTW, was this a set of cheap gauges from either interdynamics or Harbor freight? If so, that would explain a lot....

Steve