What It Means
- Error indicating a secondary refrigerant leak detected
Lennox Air handler
Lennox Error Code 697
Air handler: Air handler (indoor)
Causes & actions from Lennox
How it shows
- Wired controller display: 697
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
Error indicating a secondary refrigerant leak detected
- MMD***S6-1P
Error indicating a secondary refrigerant leak detected
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.
