Automotive Air Conditioning Information Forum (Archives)

Provided by

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

What's "too high" of a high side pressure?

m32825 on Sat May 17, 2008 3:17 PM User is offline

Year: 1987
Make: Toyota
Model: Camry
Engine Size: 2L
Refrigerant Type: R-134a
Ambient Temp: 91
Pressure Low: 25
Pressure High: 225
Country of Origin: United States

I've converted my R-12 system to R-134a. I've charged the system until the pressures are about where they normally are for R-12. Temperatures are in the low 90's with about 60% relative humidity, cooling is "okay" but not great. My fans are both running in their high setting. The sight glass shows a constant foam of bubbles, I never see any clearing. Should I add more refrigerant until they go away? I've seen warnings about "high head pressure" being bad. I don't want to damage anything, so any words of wisdom would be appreciated. How high is "too high" for the high side pressure?

TRB on Sat May 17, 2008 7:25 PM User is offlineView users profile

Becomes had to convert gas to a liquid around 300PSI in my opinion. Having a system under charged just to keep pressures low will also cause poor cooling and compressor failures.


When considering your next auto A/C purchase, please consider the site that supports you:

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.