Alfa Romeo Bulletin Board & Forums - View Single Post - High side gauge only goes up half way up
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post #5 of (permalink) Old 08-30-2012, 04:31 PM
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Join Date: Jan 2003
Location: Rapid City SD, Black Hills of South Dakota
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Like to get the low side down in the 30s, but 350 on the high side sounds way too much. More like 250 max. What Alfa tech data do you have on the system and where are you getting the 350 psi target?

The switch on the drier is most likely a trinary pressure switch that turns the compressor off when the pressure gets too high or to low, and also to turn on the electric fan on the radiator/condenser.

Are you using a R-134 expansion valve or the old OEM valve?

John Stewart
74 Spider
91 164S

Last edited by Roadtrip; 08-30-2012 at 05:14 PM.
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