Suburban 30FQ Furnace Failure
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...
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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
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
