The sight glass is always used as a reference point. You must go by the dual gauges. Never by the low side only. Jeff Cobb On Aug 4, 2016, at 8:44 PM, Pantdino via DeTomaso <detomaso@server.detomasolist.com> wrote:
After switching the AC system to 134a, do you use the sight glass in the dryer or go by the pressure at the low pressure port like with modern cars?
Sorry, but I don't recall what I learned several years ago when I switched the system over.
Jim Oddie _______________________________________________
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