What It Means
- Flame OFF? NO branch: flame sensed with valve off. Lockout main valve OFF, combustion air and system fans ON; reset thermostat.
Lennox Ducted Heating
Lennox Error Code 5 flashes
Ducted Heating:
Causes & actions from Lennox
How it shows
- ram diagnostic led: 5 flashes
Flame sensed with gas valve off. Lockout: main valve off, combustion air and system fans on.
Applicable models & manual sources
- G24M
Flame OFF? NO branch: flame sensed with valve off. Lockout main valve OFF, combustion air and system fans ON; reset thermostat.
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
