What It Means
- Normal heating standby and thermostat-open end branch. At end combustion air blower stops after5seconds; system fan stops after selected90/120/180/240second delay.
Lennox Ducted Heating
Lennox Error Code Slow flash
Ducted Heating:
Causes & actions from Lennox
How it shows
- ram diagnostic led: Slow flash
Normal heating mode standby / idle or normal cycle complete (thermostat not calling for heat, or cycle ended).
Applicable models & manual sources
- G24M
Normal heating standby and thermostat-open end branch. At end combustion air blower stops after5seconds; system fan stops after selected90/120/180/240second delay.
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.
