Topic: Atwood Furnace Wont Light … I took the outside cover off,and the furnace cycled but went into fault after 3 attempts to light. … Limit switch/Airflow problems———–1 flash with 3-second pause … You are having an ignition lockout fault.
I have a 2000 Coachman Class A with an Atwood furnace that won’t fire up. when I turn up the thermostat … Ignition Lockout Fault 3 flashes with 3-second pause … If that doesn’t do it, it’s time to start serious troubleshooting.
Re: Atwood hydro flame issues Use the Library Search function to locate it. Often a failure to ignite means there is rust or insect nests in the burner intake or exhaust. Checking/cleaning that would be my first step. And, of course, making sure the propane was on and flowing.
Replace ignition control board, use only OEM psars … Either a pilot will come on or the burner tube will ignite then spread the flame to all .
The following descriptions are based on the Hydro Flame 8500 series furnaces, but the … Atwood Furnace Error Codes …. pause; Flame Sense fault – 2 flashes with 3-second pause; Ignition Lockout Fault – 3 flashes with 3-second pause.