Suburban 30FQ Furnace Failure

Question

3 year old furnace Suburban 30FQ,,used less than 10 times,,,when calling for heat the igniters light briefly on three attempts then shuts down.  I can feel heat and hear combustion on each attempt but furnace does not stay lit.  Does not matter if I am connected to 110 or 12v,,and my tanks are good,,stove and fridge both work on the propane.

wrgrs50s · Answer

Just a thought but do you have a bug screen to keep spiders and dirt daubers out? If not you could have a blockage in the igniter/burner tube.

old-biscuit · Answer

Spark electrode dirty, not engulfed in main flame or ceramic insulator cracked

Spark electrode 'sparks' and main flame lights then goes out....repeats for 3 attempts then shuts completely down.
Main Flame is NOT 'proving' it lit.....can only do that with a clean fully engulfed spark electrode that is not tracking to ground

Clean with emery cloth, position so that it is centered over burner slots (1/8"-3/16" gap) AND no cracks in ceramic

Forum Discussion

Suburban 30FQ Furnace Failure

About Technical Issues

Related Content

Suburban Furnace Problems

Suburban SF30 Furnace

Andersen Hitch Failure

Frame Failure

Suburban furnace won't light...