What It Means
- ML180UH, ML296UHV: Lockout, burners fail to light.
- ML196UHE: Primary or Secondary limit switch open or Watchguard mode - Limit Switch open longer than 3 minutes
Lennox Ducted Heating
Lennox Ducted Heating Error Code 7 Flashes
Ducted Heating
7 Flashes means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Lockout, burners fail to light.
Models: ML180UH, ML296UHV
How it shows
- Integrated control red LED: 7 Flashes
- integrated control single led: 7 Flashes
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ML180UH
Lockout, burners fail to light.
- ML296UHV
Lockout, burners fail to light.
Primary or Secondary limit switch open or Watchguard mode - Limit Switch open longer than 3 minutes
Models: ML196UHE
How it shows
- Integrated control red LED: 7 Flashes
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ML196UHE
Primary or Secondary limit switch open or Watchguard mode – Limit Switch open longer than 3 minutes
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.
