Lennox Furnace Error Code LED1: Simultaneous Slow Flash / LED2: Simultaneous Slow Flash

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

• 90UGFA2-50
• 90UGFA3-50
• 90UGFA3-75
• 90UGFA3/4-100
• 90UGFA4/5-125
• G24M2-60
• G24M2-75
• G24M2(X)-45
• G24M3(X)-60
• G24M3(X)-75
• G24M3/4(X)-100
• G24M4(X)-75
• G24M4/5(X)-100
• G32-1
• G32-2
• G32-3
• G32-4
• G32-5
• G32Q3-75
• G32Q3/4-100
• G32Q4/5-100
• G32Q4/5-125
• G32V
• G32V-1

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…