What It Means
- 7.0 - Unit operates correctly but the diagnostic lights flash low flame sense code. LED#1-Slow Flash LED#2-Fast Flash
Lennox Ducted Heating
Lennox Error Code LED#1-Slow Flash, LED#2-Fast Flash
Ducted Heating:
Causes & actions from Lennox
How it shows
- SureLight board LEDs (DS1/DS2): LED#1-Slow Flash, LED#2-Fast Flash (led1: flashing (slow), led2: flashing (fast))
Possible cause: 7.1.1 Sense rod is improperly located on the burner. Corresponding action/comments: ACTION 1 − Check the sense rod for proper loca- tion on the burner. Properly locate the sense rod or replace if rod cannot be located correctly. Possible cause: 7.1.2 Sense rod is contaminated. Corresponding action/comments: ACTION 1 − Check sense rod for contamination or coated surface. Clean the sense rod with steel wool or replace sensor. DO NOT USE SAND PA- PER TO CLEAN ROD. SAND PAPER WILL CONTRIBUTE TO THE CONTAMINATION PROBLEM.
Applicable models & manual sources
- G24M
7.0 − Unit operates correctly but the diagnostic lights flash low flame sense code. LED#1−Slow Flash LED#2−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?
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