Lennox Furnace Error Code LED On

Where this code is documented

5 manuals in the MyPros+ library document this code for Lennox furnace.

Models covered by the manuals that document this code

• ML180DF045P24A
• ML180DF045P36A
• ML180DF070P36A
• ML180DF070XP36A
• ML180DF090P36B
• ML180DF090P48B
• ML180DF090XP48B
• ML180DF110P60C
• ML180DF110XP60C
• ML193UH
• ML193UH045P36B
• ML193UH070P24B
• ML193UH070P36B
• ML193UH090P36C
• ML193UH090P48C
• ML193UH110P48C
• ML193UH110P60
• ML195DF
• ML195DF045XP36B
• ML195DF070XP36B
• ML195DF090XP60C
• ML195DF110XP60C
• ML195UH
• ML195UH045XP24B

More models are covered than are listed here.

• 1Reverse line voltage polarity.
• 1 FlashFlame present with gas valve de-energized (control 103085).
• 1+2Low flame current during run mode (Board 100869).
• 1+3Flame sensed out of sequence
• 10Watchguard
• 11Pressure switch stuck closed prior to activation of…
• 2Improper Earth Ground.
• 2 FlashesPressure switch closed with combustion air inducer…