Mine warmed up a little at idle also. My lo pressure was around 20 and high was around 150. I have an R4 compressor, it became silent after changing refrigerants. I am out of ES12A at the moment, otherwise i would like to take the pressures up a bit to see if i can bring the idle temp down. Just not sure how low that would take running temps down to. Either way, i need more gas before i make adjustments. Noticed any mileage changes with propane?

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airedale2 Welcome to Texas
1984 MB 300D 266,000
1993 Nissan PU 271,000
2002 Tahoe 122,000
2004 VW TDI 75,000