What It Means
- MMD***M6-1P: Error indicating the refrigerant leak sensor's lifespan expired
- MMD***S6-1P: R-32 detection sensor unavailable alarm
Lennox Air handler
Lennox Air handler Error Code 700
Air handler
700 means different things on different Air handler models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Error indicating the refrigerant leak sensor's lifespan expired
Models: MMD***M6-1P
Air handler (indoor)
How it shows
- Wired controller display: 700
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
Error indicating the refrigerant leak sensor's lifespan expired
R-32 detection sensor unavailable alarm
Models: MMD***S6-1P
Air handler (indoor)
How it shows
- Wired controller display: 700
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***S6-1P
R-32 detection sensor unavailable alarm
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.
