fifth wheel furnace

Atwood 85 Series Error Codes

Internal Circuit Board Failure...........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


Ignition Lockout Fault

*Low gas pressure
Set pressure to a minimum of 11 ? W.C. with all appliances running.
Replace regulator if not obtainable.

*Exhaust blocked
Clean exhaust.

*Combustion air wheel loose
Reposition wheel and tighten.

*Electrodes out of adjustment
Adjust electrode----1/8" gap between spark electrode & ground rod.

*Electrode defective
Replace electrode.

*Circuit Board defective
Clean plug contacts. If still defective, replace. (Check on board tester when possible).

*Flame sensor wire between electrode and circuit board defective
Replace wire.

*Air leakage at gaskets
Replace gasket.

*Defective heat exchanger
Replace heat exchanger.