Forum Discussion

ShrimpBurrito's avatar
ShrimpBurrito
Explorer
Oct 30, 2013

Suburban NT-12SE furnace - gas and spark, but no fire - why?

In a previous thread: http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26967247.cfm ...I described a problem with our furnace whereby the furnace would only light when the cover is off. The...
Old-Biscuit's avatar
Old-Biscuit
Explorer III
Oct 30, 2013
Yes.......

The spark is happening too far away from gas flow to ignite the flame.

Bend the assembly down so that electrode is within 1/4-3/16" of slots and directly over that center group of slots. Also spark gap should be 1/8" from tip of electrode to the ground rod.

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