What It Means
- MWCB, MWHB: ECO mode
- MLA, MPA, MPB: Normal operation
- MWCB, MWHB: Time On
Lennox Split & Multi-Split
Lennox Split & Multi-Split Error Code On
Split & Multi-Split
On means different things on different Split & Multi-Split models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
ECO mode
Models: MWCB, MWHB
Mini-split unit (indoor)
How it shows
- 508242 indoor display: On
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MWCB
ECO mode
MWCB, MWHB
Normal operation
Models: MLA, MPA, MPB
Mini-split unit (outdoor)
How it shows
- corp1816 single zone led 009 012: On
Normal operation (Single-Zone 009/012 115VAC/208-230VAC LED 1: Blue/Red)
Applicable models & manual sources
- MPA
Normal operation
MPA, MPB, MLA
Time On
Models: MWCB, MWHB
Mini-split unit (indoor)
How it shows
- 508242 indoor display: On
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MWCB
Time On
MWCB, MWHB
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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