payne plus 90 - no flame

Michigan23

I got back from vacation and asked my father to turn my furnace up to 70 before my family got back to house. I got to house and thermostat was at 59, set for 70. Furnace cycles but no flame. Replaced ignitor which seemed to fix problem, furnace came on flame kicking out heat went to get family returned a few hours later to find temp was at 68 set for 72 and furnace is doing same thing, cycles no heat. The temp out side is around 15 so I thought maybe the ignitor was bad, or I damaged it going in so i bought another for $25 and put it. Furnace did same thing started up fine flame on and heated the house from 58 to 68 and now the same problem is occuring heater cycles and does not kick out a flame. Trouble code flashes 31; outside vents clear and unobstructed. Any suggestions would be greatly appreciated, thanks.

Michigan23

right after posting register pumping out warm air; checked furnace flame on everything seems ok.

What could be causing this problem if the furnace stops igniting again?

Thanks

yuri

That code could be a pressure switch problem due to partially blocked venting. If it has a concentric kit outside stick your fingers in behind it and check for ice/blockage. There has been a lot of problems with the pressure switches failing on those units if it mounts on the ventor fan. I have changed quite a few. Probably a good idea to replace it. Make sure there is NO snow pile/buildup near the vent pipes or it may recirculate into the intake etc.

SKIP4661

Your condensate drain may be draining slow. You should clean the condensate trap annually.

Michigan23

thanks skip, the condensate had lots of build up and was draining slowly, I drained about 1 liter out and cleared out the trap and lines leading up to and after trap.

Have had no problem since clearing trap last night.
Thanks again,
Carl