Forum > Coach
Furnace Issue - Suburban NT-30 won't light
vincewarde:
I have a Suburban NT-30 furnace that is giving me fits. Before coach went into storage, it worked. Then I got a wasp's nest in the blower. I cleaned that out and it now spins up fine - but won't light.
So, next I inspected and replaced the igniter (it was badly corroded). I can hear it firing, but still no flame.
I next checked the gas valve. I can both hear it opening and a test light shows that both magnets are getting power.
All I can think to do is tear out the plumbing and make sure it is clear - and perhaps check to see that the valve is actually opening. Yes, there is gas and yes, the valve to the furnace is open :)
Does anyone else have any ideas? Thanks!
DonD:
I put mine on the bench and powered it up. It turned out to be the sail switch wasn't free, was hanging up a bit. I freed that and exercised the gas valves and she woks well now.
vincewarde:
According to the information in the manual, the sail switch has to be working for the gas valve to be energized. Therefore, I don't think that is the problem. I am really stumped. Hm?
DonD:
My valves wouldn't pass air when blown into but a few cycles and they freed up. Blow by mouth or very low pressure.
joanfenn:
I know a lot of guys that have valves that pass air, usually at the most inconvenient time too. W%
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