Don't know if this thread can needs to go somwhere else more appropriate, but anyways. I went to light the pilot on teh furnace the other day and when I popped the cover the decal boldly stated that no lighting of anything is necesary, great I thought- I got a furnace with a sparker pilot. after fumbling and folling the directions there was no heat outta the vents or anything, yes- the blowefr motor worked. I dug around and looked some more and siad to myself that that sure does look like a pilot diaphragm there. I found a little booklet and dicovered that this is indeed an add- on diaphragm, seems that the fellat B4 me had his own propane tank earlier on then when community gas became available witched to that but left the furnace the way it was. So the big question is, how big of a job is it to change the unit back to the way it was so I don't have that little blow torch going all the time and paying for it................