This was a routine semi-annual checkout. And he said everything is mechanically fine. I hope that is the case. He did say that my ducts and the system plenum is very dusty and he is recommending a cleaning and installation of a UV system. He indicated it could affect the life of the system. He could be right, although he didn't offer a detailed explanation about the problem and the value of the fixes. He e-mailed me 3 quotes for different levels of additions to my system, which I will study.
