Arrived on site for heating maintenance, Customer stated no issues with the unit. It turned on all three thermostats to Heating and set to 80 to kick on the furnace. Furnace kicked on normally. Turned off thermostats back off until about the panel of the furnace. Checked every hose connection in the furnace notice two connections slightly on, pushed connections further in and made sure for secure fit. Flame sensor was slightly off put with a loose screw, screwed in the screw for a tighter connection, flame sensor was still a but off but fully functional. Turned on the thermostats while having the furnace off, went to the basement and turn the furnace back on and see it kick on with the flame sensor unplugged. Furnace did not stay on, confirming safety of the unit. Blue out the drain line of the Furnace with a CO2 cartridge. The pellets of the high efficiency furnace are in good condition still and so is the filter.
