Lennox Ducted Heating

Lennox Error Code ON, OFF

Ducted Heating:

What It Means

  • Circuit board failure or control wired incorrectly.

Causes & actions from Lennox

How it shows
  • SureLight board LEDs (DS1/DS2): ON, OFF (led1: on, led2: off)
  • SureLight board LEDs (DS1/DS2): ON, OFF (led1: on, led2: off)
  • SureLight board LEDs (DS1/DS2): ON, OFF (led1: on, led2: off)

This manual entry does not list further causes or actions.

Applicable models & manual sources
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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