Atwood Furnace Wont Light
I was checking out a friends furnace today, its an atwood, sorry don't know model no., in a 2007 coachmen Wyoming 36 ft 5er. I took the outside cover off,and the furnace cycled but went into fault aft...
Forum Discussion
Atwood Fault Codes
Fault...............................LED Indication
Internal Circuit Board fault-------------Steady on, no flashing
Limit switch/Airflow problems-----------1 flash with 3-second pause
Flame Sense fault--------------------2 flashes with 3-second pause
Ignition Lockout Fault----------------3 flashes with 3-second pause
You are having an ignition lockout fault.
That would mean that the electronics is not detecting a flame that MAY be there.
Maybe a bad ground.
Or, the sparking you hear may not be taking place at the place it should be.
Possibly a bad spark electrode or high tension wire.
The other thing is it not firing/refiring with cover in place.
That suggests an air flow imbalance....blockage in combustion/exhaust chamber
Or possibly a cracked heat exchanger
LP Detector
RED light...Alarm along with LOUD BEEP
Green Light.....All good
Yellow Light......thought that was an indication that LP Detector should be replaced.
Low voltage is not occurring at 12.9V
2007 year rig.....detector probably is on last legs. They have a self life (sensor) and should be replaced 5-7 yrs
Fault...............................LED Indication
Internal Circuit Board fault-------------Steady on, no flashing
Limit switch/Airflow problems-----------1 flash with 3-second pause
Flame Sense fault--------------------2 flashes with 3-second pause
Ignition Lockout Fault----------------3 flashes with 3-second pause
You are having an ignition lockout fault.
That would mean that the electronics is not detecting a flame that MAY be there.
Maybe a bad ground.
Or, the sparking you hear may not be taking place at the place it should be.
Possibly a bad spark electrode or high tension wire.
The other thing is it not firing/refiring with cover in place.
That suggests an air flow imbalance....blockage in combustion/exhaust chamber
Or possibly a cracked heat exchanger
LP Detector
RED light...Alarm along with LOUD BEEP
Green Light.....All good
Yellow Light......thought that was an indication that LP Detector should be replaced.
Low voltage is not occurring at 12.9V
2007 year rig.....detector probably is on last legs. They have a self life (sensor) and should be replaced 5-7 yrs
