What It Means
- Pressure Switch failed to close or opened during heat demand
Lennox Ducted Heating
Lennox Ducted Heating Error Code 9
Ducted Heating:
Causes & actions from Lennox
How it shows
- Integrated control red LED: 9
This manual entry does not list further causes or actions.
Applicable models & manual sources
- EL195UH
Pressure Switch failed to close or opened during heat demand
- EL195UHNE
Pressure Switch failed to close or opened during heat demand
- EL196UHE
Pressure Switch failed to close or opened during heat demand
- ML180UHE
Pressure Switch failed to close or opened during heat demand
- ML180UHV
Pressure Switch failed to close or opened during heat demand
- ML193UHE
Pressure Switch failed to close or opened during heat demand
- ML196UHE
Pressure Switch failed to close or opened during heat demand
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.
