scottmac
Nov 16, 2013Explorer
Suburban furnace SF-30F serial#940804195
long story short- furnace only "fires" gas when plugged in to 'shore' power or 2400 yamaha generator, t-stat calls for heat,blower kicks on, few seconds and gas fires to burners =A OK.. on 12v(fully charged deep cell) when t-stat calls, blower motor runs and run but no fire, if I remove front cover (by limit switch) it fires off ??(blowing hot air into room and not down ducts of course) if I turn temp down and furnace stops and cools(like it should),so I replace cover of furnace and same thing happens, will not fire gas. I bent the cover somewhat so that it still attached to the box with screws but the 'bend' in the sheetmetal at the top lets some forced air out thru 1/2" gap....fires everytime perfectly...I am thinking maybe the sailswitch could be in play,(but I thought the sail had to do with firing off the blower) but as you can tell from the model, that this furnace has no exterior access, so it all comes out the front to access the sail switch and other parts..ughh. can someone shed some light on this situation for me?? thanks so much