What It Means
- Indoor unit Eva Out sensor (Open/Short)
Lennox Air handler
Lennox Air handler Error Code 123
Air handler: Air handler (indoor)
Causes & actions from Lennox
How it shows
- Wired controller display: 123
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
Indoor unit Eva Out sensor (Open/Short)
- MMD***S6-1P
Indoor unit Eva Out sensor (Open/Short)
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.
