Hello, I've searched the archives for my problem with my Heil furnace but couldn't find anything so here goes.
My furnace is a 1978 vintage system. It is an oil fed / forced air system. I have been having a problem with it shutting down on its own. I've narrowed the problem to it becoming air locked and starving for fuel. All I have to do is open the pet cock drain, push the reset button and let it run into a pan until clear oil flows and close the pet cock and it then runs fine. This has been happening several times beginning last winter and now has happened just recently.
Things I have done or checked: a) Replace the oil filter b) Check the breather pipe for blockage on the oil storage tank c) Replace the nozzle d) Replace the flame sensor e) Tighten all fittings f) The tank is over half full
Any other ideas or suggestions? The furnace seems to run fine otherwise.