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Old 07-05-2002, 06:29 PM
pmizell's Avatar
Benz Zealot
 
Join Date: Jun 2001
Location: Houston, Texas
Posts: 838
R-12 AC pressure readings - need freon or not?

I first checked high and low side with engine off -- pressure reading at both was just under 100psi.

Pressure at low side after running AC for awhile was about 33psi -- high side read 190psi.

Are these readings low, high, or just about right? Sight glass shows moving milk.

If low, approximately how much freon will it take to get a full charge?

TIA, as always!

~Paul

_________________
'91 300E, 214K miles

Last edited by pmizell; 07-05-2002 at 07:44 PM.
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