What It Means
- MMD***M6-1P, MMD***S6-1P: COM1/COM2 Cross-installed error
- MMD***M6-1P: Error of Main wired remote controller and Sub wired remote controller setting
Lennox Air handler
Lennox Error Code 606
Air handler
606 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
COM1/COM2 Cross-installed error
Models: MMD***M6-1P, MMD***S6-1P
Air handler (indoor)
How it shows
- Wired controller display: 606
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
COM1/COM2 Cross-installed error
- MMD***S6-1P
COM1/COM2 Cross-installed error
Error of Main wired remote controller and Sub wired remote controller setting
Models: MMD***M6-1P
Air handler (indoor)
How it shows
- Wired controller display: 606
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MMD***M6-1P
Error of Main wired remote controller and Sub wired remote controller setting
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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