What It Means
- Burner OFF? NO in continuous flame check: gas valve OFF, combustion air blower ON, indoor blower ON at heating speed. LED1 SLOW flash AND LED2 OFF.
Lennox Ducted Heating
Lennox Error Code LED #1 SLOW FLASH / LED #2 OFF
Ducted Heating:
Causes & actions from Lennox
How it shows
- SureLight board LEDs (DS1/DS2): LED #1 SLOW FLASH / LED #2 OFF (led1: flashing (slow), led2: off)
Burner not off during continuous flame check (flame sensed when burner should be off). Gas valve off, combustion air blower on, indoor blower on heating speed.
Applicable models & manual sources
- G24M
Burner OFF? NO in continuous flame check: gas valve OFF, combustion air blower ON, indoor blower ON at heating speed. LED1 SLOW flash AND LED2 OFF.
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.
