What It Means
- Internal control board fault or no power
- No power or control hardware fault.
- Internal control fault OR no power to control OR Gas Valve Relay Fault.
Lennox Packaged Unit
Lennox Packaged Unit Error Code Steady Off
Packaged Unit
Steady Off 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
Internal control board fault or no power
10 models
LDT078, LDT092, LDT102, LDT120, LDT152, LGM156U, LGM180U, LGM210U, LGM240U, LGM300U
Packaged HVAC (outdoor)
How it shows
- dsi ignition heartbeat led: Steady Off
This manual entry does not list further causes or actions.
Applicable models & manual sources
- LDT078
Internal control board fault or no power
LDT078, LDT092, LDT102, LDT120, LDT152
- LGM156U
Internal control board fault or no power
LGM156U, LGM180U, LGM210U, LGM240U, LGM300U
No power or control hardware fault.
8 models
LGM036, LGM048, LGM060, LGM074, LGT036, LGT048, LGT060, LGT072
Packaged HVAC (indoor)
How it shows
- dsi ignition heartbeat led: Steady Off
This manual entry does not list further causes or actions.
Applicable models & manual sources
- LGM036
No power or control hardware fault.
LGM036, LGM048, LGM060, LGM074
- LGT036
No power or control hardware fault.
LGT036, LGT048, LGT060, LGT072
Internal control fault OR no power to control OR Gas Valve Relay Fault.
4 models
ZGD036, ZGD048, ZGD060, ZGD074
Packaged HVAC (outdoor)
How it shows
- dsi ignition heartbeat led: Steady Off
This manual entry does not list further causes or actions.
Applicable models & manual sources
- ZGD036
Internal control fault OR no power to control OR Gas Valve Relay Fault.
ZGD036, ZGD048, ZGD060, ZGD074
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.
