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markdoughty
Oct 19, 2013, 03:56 PM
This furnace ignites just fine. But then after burning about 3seconds it cuts off. What causes this?

Grady White
Oct 19, 2013, 04:32 PM
If this is spark or hot surface (glow plug) ignition, there should be a rod with a porcelain insulator & one wire on the opposite end of the burner rack from the ignition. Remove this rod, clean with fine steel wool or a scotch brite pad & reinstall. Try firing the furnace again.