What It Means
- Control board failure
- Control internal failure.
- Power applied. Control OK.
Lennox Packaged Unit
Lennox Packaged Unit Error Code Steady On
Packaged Unit
Steady On means different things on different Packaged Unit models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Control board failure
10 models
LDT078, LDT092, LDT102, LDT120, LDT152, LGM156U, LGM180U, LGM210U, LGM240U, LGM300U
Packaged HVAC (outdoor)
How it shows
- dsi ignition heartbeat led: Steady On
This manual entry does not list further causes or actions.
Applicable models & manual sources
- LDT078
Control board failure
LDT078, LDT092, LDT102, LDT120, LDT152
- LGM156U
Control board failure
LGM156U, LGM180U, LGM210U, LGM240U, LGM300U
Control internal failure.
4 models
ZGD036, ZGD048, ZGD060, ZGD074
Packaged HVAC (outdoor)
How it shows
- dsi ignition heartbeat led: Steady On
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ZGD036
Control internal failure.
ZGD036, ZGD048, ZGD060, ZGD074
Power applied. Control OK.
4 models
LGT036, LGT048, LGT060, LGT072
Packaged HVAC (indoor)
How it shows
- dsi ignition heartbeat led: Steady On
This manual entry does not list further causes or actions.
Applicable models & manual sources
- LGT036
Power applied. Control OK.
LGT036, LGT048, LGT060, LGT072
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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