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Atwood Furnace Fault Codes

Fault codes for the Atwood Furnace Model 8520 IV DCLP. The codes are flashed by a red bulb on the circuit board:

  • 1/w 3 second pause - Air flow/limit Fault
  • 2/w 3 second pause - Flame Sense Fault
  • 3/w 3 second pause - Ignition Control Failure
  • Steady on/no flashing - Internal Control Failure

Dale O'Daniel 03 39S, via eGroup

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