Hector/Tom,

Thanks for the info and suggestions. At this time there is no referigerant at all in the Galley/bedroom system. As best I can tell, since the PO struck through the R-12 label and put R-420 on it, the system last had that refrigerant instead of R-12. On the Dash A/C, Prevost advised Gregory Poole they would not work on an old unit without upgrading away from R-12 going to R-134A. That was the primary reason for my changing the Dash A/C to R-134A. My thought now is to keep all OTR A/C units working with the same refrigerant. The R-420 was most recently $400 a bottle. The R-134A was most recently $100 a bottle. The dash a/c is now leak free and does a good job of cooling the front of the bus. If I can get the galley and bedroom working the same then we should be in good shape for some years ahead.

Hope everyone had a great Christmas today.