Tomguy, It was converted to R134 about 3 years ago. About 6 months ago a 2X4 cut the high pressure (small diameter) line from the dehydrator to the expansion valve and I have just now started to do anything about it so I assume the athmosphere has gotten in the circuit. My plan was to run a can of r134 thru it and then close the circuit and add a small can of R134a ester oil charge (2 oz) and recharge it with r 134. Any comments welcome. Milt.

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Milterino
76 450 S.E.L.