Thanks Rod. I have leak detector dye in the system, and I have the light and glasses, but didn't see any leaks. The compressor stayed on the whole time. I checked the charge with my cheapie gauge and it was on the low side so I tried adding a short boost of refrigerant. Now the compressor cycles on and off, about 5 or 6 seconds at a time. No change in temperature.
I'm think of adding a more 134a tonight. Short of starting to take the system apart, I don't know what else to do.
