Lennox Ducted Heating

Lennox Ducted Heating Error Code U

Ducted Heating: Gas furnace (indoor)

What It Means

  • Discharge air temperature

Causes & actions from Lennox

How it shows
  • Integrated control 7-segment display: U

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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