What It Means
- Clogging of outdoor's service valve
Lennox Air handler
Lennox Error Code Clogging of outdoor's service valve
Air handler: Air handler (indoor)
Causes & actions from Lennox
How it shows
- mmd m6 receiver concealed led: green flashing, red off, led3 off, led4 flashing, led5 flashing (green: flashing, led3: off, led4: flashing, led5: flashing, red: off)
- mmd m6 receiver standard led: led1 flashing, led2 off, led3 off, led4 flashing, led5 flashing (led1: flashing, led2: off, led3: off, led4: flashing, led5: flashing)
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
Clogging of outdoor's service valve
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
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