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mvannorman 12-04-2007 11:43 AM

Heil Furnace Backfire.
I Have A 15 Yr Old Heil Propane Frequently Backfires On
One Or Two Burners When Startup And Will Have Flame Pulsing Inside Burners As Well As Flame Out Normal Area.i Have Replaced
Cross Lighter Bar And Gas Valve.all Burners Are Clean.gas Psi Has
Been Confirmed To 10.wc.furnace May Light 2-4 Times Without
Backfire/inside Flame Than Backfire Next Couple Times.please Help,
Furnace Pro Stumped. Thanks,mike

inspectorD 12-05-2007 05:55 AM

Maybe a new furnace pro for some different options??
Sounds like there is something in the the drip leg full of water?

I can't help to much...but propane is a serious problem if not fixed.
Good luck.

glennjanie 12-05-2007 02:17 PM

Welcome Mike:
On the face of the burners there is an air adjustment shutter with a screw to hold it on setting. You can loosen the screw and turn the shutter until the burner shows a nice blue flame with no smoke then retighten the screw. Another possibility is a dirty orifice in the center of the burner. Take the orifices out and clean all of them with the correct size wire cleaner or a drill bit of specific size. The LP gas place will have the wires or bits. The bits for this have a hex end on them and can be turned with your fingers.
Please let us know how it turns out.

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