Yesterday, I unclogged the furnace condensation line and trap, and removed moisture from our furnace. Now when I power on the furnace, everything seems fine. The fan comes on, the igniter lights blue flames to all burners, they stay lit for 5 seconds, than it stops sending gas, and flames are out. It cycles through that process, but never stays lit.
I think I have done all I can, any other advice out there. Thanks