Furnace Runs Once Then Won't Start Until After Re-set

[JSSANDFORD]

Hi All,

I have an Atwood 8531-IV-DCLP furnace that won't start after it has run once upon start-up. After that when the thermostat calls for heat it won't run until I manually switch it off and then on with the switch in the outside panel. The thermostat and switch are both new but I suspect the issue existed before I replaced them (that's why I replaced them). Any help would be appreciated.



Thanks...Jeff