Lennox Equipment not specified

Lennox Error Code 275

Equipment not specified:

What It Means

  • GF Flame Out Of Seq. No Flame

Causes & actions from Lennox

How it shows
  • iComfort S30 alert: 275

Priority condition: Service Urgent The furnace flame is out of sequence. The system will go into Watchguard mode. • Shut off gas. • Check for gas valve leak.

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.

What should you check next?

Continue in ACLogics with guided diagnosis for your equipment and symptoms.

See how guided diagnosis works →