Marc performed a very thorough, conscientious series of furnace and air conditioner functional checks. I can't recall anyone doing a combustion gases efficiency check in the flue before. Just a visual check of the flame appearance. He left a print-out of the satisfactory results taped to the flue. That was impressive! He checked the pressure drop on the accordion-type fabric filter and found it didn't need to be replaced yet. He checked the performance of the air conditioner compressor system and found that it hadn't had a significant loss of the 5 lbs of refrigerant that was added at the last CJS visit. He found clogging material in what appeared to be a manifold for the condensate drain and cleaned it. I forgot to ask Marc if that was what it was. He probably did some other tasks that I didn't see because I didn't look over his shoulder while he worked.
