What It Means
- Thermostat calls for heat: LED1 FAST flash AND LED2 FAST flash.
Lennox Ducted Heating
Lennox Error Code LED #1 FAST FLASH / LED #2 FAST FLASH
Ducted Heating:
Causes & actions from Lennox
How it shows
- SureLight board LEDs (DS1/DS2): LED #1 FAST FLASH / LED #2 FAST FLASH (led1: flashing (fast), led2: flashing (fast))
Thermostat calls for heat.
Applicable models & manual sources
- G24M
Thermostat calls for heat: LED1 FAST flash AND LED2 FAST flash.
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.
