What It Means
- MMD***S6-1P: R-32 detection sensor replacement alarm
- MMD***M6-1P: Error indicating a refrigerant leak sensor replacement is required
Lennox Air handler
Lennox Air handler Error Code E699
Air handler
E699 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
R-32 detection sensor replacement alarm
Models: MMD***S6-1P
Air handler (indoor)
How it shows
- samsung receiver concealed led: GREEN off, RED off, Timer icon blinking, Fan icon blinking, Filter icon blinking
- samsung receiver error label: E699
- samsung receiver standard led: Power icon off, Snowflake/drop icon off, Timer icon blinking, Fan icon blinking, Filter icon blinking
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***S6-1P
R-32 detection sensor replacement alarm
- MMD***S6-1P
R-32 detection sensor replacement alarm
Error indicating a refrigerant leak sensor replacement is required
Models: MMD***M6-1P
Air handler (indoor)
How it shows
- mmd m6 receiver concealed led: green off, red off, led3 flashing, led4 flashing, led5 flashing (green: off, led3: flashing, led4: flashing, led5: flashing, red: off)
- mmd m6 receiver standard led: led1 off, led2 off, led3 flashing, led4 flashing, led5 flashing (led1: off, led2: off, led3: flashing, led4: flashing, led5: flashing)
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
Error indicating a refrigerant leak sensor replacement is required
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.
