Arrived onsite for heating maintenance 1 high efficiency gas fired furnace in the basement with 3 zones. Basement Furnace System:. Turn heat on and confirmed operation. Changed polarized filter provided by homeowner. Used last filter and more have to be ordered. Brushed and Wiped down furnace blower cabinet and gas burners. Burners fired and are in good working order. Blew out condensate line for the condensing furnace. No visual impingement detected. Checked electrical. Turned humidifier on for winter. Cleaned the flame sensor. Measured temperature rise at 41 degrees. System working as it should.
