Model reference
Lennox O23Q5-140/154
Furnace
1 document4 error codes1 service mode
Available documentation
Service Manual
- O23 / OHR23 / OF23 SERIES UNITS Service Literature39 pg
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Error codes (4)
CodeMeaning
LED Flashing 1/2 sec on 1/2 sec offLockout or Restricted Lockout condition on R7184B burner control (-5 units…LED Flashing 2 sec on 2 sec offRecycle mode on R7184B burner controlLED OffFlame not sensed by cad cell (R7184B burner control, -5 units only).LED OnFlame sensed by cad cell (R7184B burner control, -5 units only).Service modes (1)
- Cad Cell Resistance Check (-5 units)With the burner firing and after ignition is off, press (1/2 second or less) and release the reset…
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