If I'm following correctly, the compressor would only run for 3 min at a time yesterday but ran for 12:30 straight today? I wonder why? Also, may be perfectly normal for this unit, but a temperature differential between cabin temp and supply air over over 30 degrees seems too high to me. If the supply air is at 40 degrees the actual evaporator temp is most likely very close to freezing the condensate on the fins.