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bbarnesy's avatar
bbarnesy
Explorer
Sep 12, 2025

Suburban NT-20seq furnace will not light at all.

Fan and motor seems to be working fine, I have good spark at the igniter. Furnace will cycle 3 times than lockout. I hear a click from the gas valve when igniter starts but no gas/flame. Exhaust is c...
Asking for Advice
bbarnesy's avatar
bbarnesy
Explorer
Sep 13, 2025

Bought the camper new in 2019. So 6 years old. I have taken it all apart and have not seen any evidence of bugs. Will try actually blowing it out. Thinking of replacing gas valve next.

StirCrazy's avatar
StirCrazy
Moderator
Sep 14, 2025

ya, if you can't smell gas outside at the exhaust, that's a good place to start looking, does the igniter fire when you try to start it? 

  • bbarnesy's avatar
    bbarnesy
    Explorer
    Sep 14, 2025

    Yes, I hear and see the ignition attempting to light. Also hear a click at what I think is the gas valve/solenoid. 

    • StirCrazy's avatar
      StirCrazy
      Moderator
      Sep 14, 2025

      so before you run out and buy a gas valve I would confirm you have propane to the inlet side of the gas valve.  do all the other gas appliances work perfect? 

      • bbarnesy's avatar
        bbarnesy
        Explorer
        Sep 14, 2025

        Yes, stove and fridge work perfect and are right near the furnace. Water heater as well. 

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