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ShrimpBurrito's avatar
ShrimpBurrito
Explorer
May 24, 2013

Suburban NT-12SE furnace only lights with cover off - why?

Hi - I'm hoping I posted this in the right place. We have a 2004 Casita trailer with a gas-fired furnace -- a Suburban NT-12SE -- that does not consistently light, except when I remove the front c...
Ex-Tech's avatar
Ex-Tech
Explorer
May 29, 2013
Having the cover off allows more air to flow from the fan.
Are you sure that the gas valve is opening when the cover is on?

If the ignitor was defective, it wouldn't work even with the cover removed.

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