Atwood 7900 series furnace troubleshooting
I have a brand new 7916-II installed in my small coach. Thermostat is brand new, t-stat wiring is brand new. The furnace gets most of the way through the ignition cycle before failing. 1. T-sta...
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Loosen the propane line going to the furnace just a bit and see if you get propane flow. If you do, retighten propane line and wait 10 minutes. Stand outside by the furnace and have someone operate the thermostat. Stick you nose up near the exhaust pipe but keep your face away from the pipe. (Do you smell propane during and right after each ignition attempt). If you do, you have an igniter placement problem or an igniter lead wire that is shorted somewhere allowing the spark to jump to ground and not through the igniter.
If you don't smell propane,(which is usually what I find) remove the burner assembly and inspect the LP orifice. I normally find a bug inside the orifice.
All this is assuming you described your problem correctly and you have no LP ignition, not even 2-5 seconds worth.
If you don't smell propane,(which is usually what I find) remove the burner assembly and inspect the LP orifice. I normally find a bug inside the orifice.
All this is assuming you described your problem correctly and you have no LP ignition, not even 2-5 seconds worth.
