Hi all! I am a new poster to the forum, though I have used several pieces of advice from past posts. I am a very competent DIYer in many areas, and greatly appreciate sources of information like this forum.
I purchased a house about a year ago with a Lennox G14 pulse furnace. I know some people love them and some hate them. Some think they're the best furnace designed and some think they're deathtraps. So far it's been reliable for me, though I've made a couple adjustments (from advice and information from this forum) to the blower control to tune the operation and prevent short cycling of the fan on cool down. I haven't needed to touch anything related to the gas or combustion, and hope I never will have to.
My problem this morning, the first day we fired up this season, was with the intake (purge) blower. It got voltage but wouldn't turn, so the furnace wouldn't light. I ended up taking off the motor from the fan (2 long mounting screws that attach the motor and shaft bearing to the fan body), spinning the fan blade shaft by hand, then reassembling. It now works. I'd like to be able to remove the fan entirely from the furnace so I can clean and lubricate it, or possibly replace it if necessary, but I can't determine how it's mounted. Where are the screws that attach the blower body to the furnace? I can see lots of small screws that hold the two halves of the fan body together, but can't see any that hold the body to the furnace. The G14 service manual I have doesn't show the attachment points, either. Do they come up from the bottom, from the insulated chamber that holds the air flapper assembly?