In my York/UPG gas furnace, the inducer was making a noise but furnace was working good. Tapping the inducer helped the noise go away for a day. Heating worked well. The noise re-appeared next day. When inducer was opened, found a broken pencil in the inducer. Removed the pencil and reinstalled the inducer. The furnace worked well for a night.
However since the next night, the inducer is not turning on at all when heat is called for. Supplied 120VAC by cheating wire and inducer works well. There are no flash codes, no lockouts. The blower turns on but inducer does not turn on at all (of course no heat also). Replaced the control board 50A50-241 by 50A55-843 but the condition remains the same. Checked the pressure switch, roll-out, they are closed/short/zero ohm. Tried to press the reset on roll-out but it does not go in.
When door switch operated 4-5 times in quick succession, I see inducer turns on for 3-4 seconds and then the control board flashes code 5 i.e. roll-out switch. But the switch is found clsoed when tested using multi-meter. Going around the roll-out also does not help. If roll-out wires are kept open and door closed, the inducer turns on for 4-5 seocnds and then 5 flash codes are seen on control board. Please help with possible solutions. thanks a lot in advance fro your help.