As in the past the service crew were excellent "spokesmen" for the company. They called ahead. Were ontime, Efficiently ran diagnosics and took the time and patience to answer questions and explain what they were doing. They gave recommendations to make the system operate better and gave options on making improvements. I ultimately went ahead with an electronic UV system to kill mold spores, and am considering the electronic air cleaner option.
Arrived at customers house to perform annual maintenance, while doing so customer explained to me he wasn’t getting heat in one zone, check the circulator pump was overheated and making a clicking sound. Replace circulator pump
Found first floor coil was a air bound. Air handler was about 10 feet from boiler purged about 3 gallons of water out of it. Ran unit for 20 minutes. Temperature never dropped at Delta T on air handler. Circulator pump was operational. Tested unit. System operational.