Moderator Post (s) for this thread: >The most usual causebyHKestenholz on 02/27/2007
OK. I checked the manual and it says Lennox 80 UHG Series. I hope this is helpful. I wasn't able to get into the attic last night to check the exact model number, so I hope this will be helpful. Any other insght would be greatly appreciated. I will check the ignition sensor this weekend.