Lennox Ducted Heating

Lennox Error Code LED #1 Slow Flash / LED #2 Fast Flash

Ducted Heating:

What It Means

  • Flame signal ABOVE0.7microamps? NO: low flame signal; does not affect control operation. LED1 SLOW flash AND LED2 FAST flash.

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))

Low flame signal (flame signal not above 0.7 microamps). Does not affect operation of control.

Applicable models & manual sources
  • G24M

    Flame signal ABOVE0.7microamps? NO: low flame signal; does not affect control operation. LED1 SLOW flash AND LED2 FAST flash.

    G24M manual, page 28

Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.

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