[davidz71]

Operation of the Armstrong AC on the '77 Excella I bought over a year ago was iffy when purchased. An RV dealer in AZ. had gone over the unit for the individual I bought it from. He suggested I replace the Armstong with a Duo-Therm Brisk Air because the wattage draw was the lowest on the market and he thought the Armstrong was a gonner. I had a friend check the freon, it was good. The compressor would not engage because a 14 volt transformer was only sending 9 volts to the thermostat which wasn't even measuring any voltage at the thermostat. I replaced the transformer, set the thermostat, turned the AC on and instantly I heard the compressor kick in. What cold air I am getting. The Brisk Air is a good unit but I am glad I didn't have to spend money on a new AC. By the way, thank god for a good service manual. I wouldn't have been able to trace the problem down if I didn't have it. Craig