What It Means
- ML180UH, ML296UHV: Line voltage polarity incorrect.
- ML196UHE: Pressure Switch failed to close or opened during heat demand, inducer on
Lennox Ducted Heating
Lennox Error Code 9 Flashes
Ducted Heating
9 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
Line voltage polarity incorrect.
Models: ML180UH, ML296UHV
How it shows
- Integrated control red LED: 9 Flashes
- integrated control single led: 9 Flashes
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ML180UH
Line voltage polarity incorrect.
- ML296UHV
Line voltage polarity incorrect.
Pressure Switch failed to close or opened during heat demand, inducer on
Models: ML196UHE
How it shows
- Integrated control red LED: 9 Flashes
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ML196UHE
Pressure Switch failed to close or opened during heat demand, inducer on
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.
