My sister-n-law are staying in a camper while thier house is being built and when they turned thier furnace
, a Hydro-Flame 8511-2, on a few weeks ago it ran fine for about 4 hours then it woke them up with a screeching noise.
Her husband turned it off (he is deathly afraid of any gas appliance) and vowed to get a repair-man.
Repair man came and ran furnace
and let screech go on and said run it and it may come out....It has been a week now and still noise...though she said not as loud and when she raps the inside cover it will vary pitch of sound.
Any place on this Hydro Flame 8511-2 that thay could lube or where should they start to look without takeing furnace