What It Means
- Improper main ground or line voltage below 75 volts; OR: Broken ignitor; OR: Open ignitor circuit.
Lennox Ducted Heating
Lennox Error Code LED #1: ALTERNATING FAST FLASH, LED #2: ALTERNATING FAST FLASH
Ducted Heating:
Causes & actions from Lennox
How it shows
- SureLight board LEDs (DS1/DS2): LED #1: ALTERNATING FAST FLASH, LED #2: ALTERNATING FAST FLASH (led1: flashing (fast), led2: flashing (fast))
This manual entry does not list further causes or actions.
Applicable models & manual sources
- G24M
Improper main ground or line voltage below 75 volts; OR: Broken ignitor; OR: Open ignitor circuit.
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.
