What It Means
- Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
Lennox Ducted Heating
Lennox Ducted Heating Error Code E125
Ducted Heating: Gas furnace (indoor)
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E125
Hardware problem on the control. Cycle power on control. Replace if problem prevents service and is persistent. Critical alert. Cleared 300 seconds after fault recovered.
Other manual wording (1 of 3)
EL280UHEK, EL280UHEK(X), EL297UHEK, ML296UHVK, ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK,…
Hardware problem on the control. Cycle power on control. Replace if prob- lem prevents service and is persistent. Critical alert. Cleared 300 seconds after fault recovered.
Other manual wording (2 of 3)
SL280DFNV, SL280UHV, SL297UHNV
Hardware problem on the control. Cycle power on control. Replace if problem prevents service and is persistent. Criti- cal alert. Cleared 300 seconds after fault recovered.
Other manual wording (3 of 3)
SLP98UHV, SLP99UHV
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is persistent.
Applicable models & manual sources
- EL180UHNE(K)
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- EL195UHNEK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
EL195UHNEK, EL195UHNEK-01, EL195UHNEK-02
- EL196UHEK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- EL280UHE(X)
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- EL296UHE
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- ML180UHVK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- ML193DFEK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- ML196UHEK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- ML196UHEK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- EL280UHEK
Control failed self-check, internal error, failed hardware. Will restart if error recov- ers. Integrated control not communicating. Covers hardware errors (flame sense cir- cuit faults, pin shorts, etc.).
EL280UHEK, EL280UHEK(X)
- EL297UHEK
Control failed self-check, internal error, failed hardware. Will restart if error recov- ers. Integrated control not communicating. Covers hardware errors (flame sense cir- cuit faults, pin shorts, etc.).
- ML296UHVK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Inte- grated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- ML297UH045XV36BK
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Inte- grated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK
- SL280DFNV
Control failed self-check, internal error, failed hardware. Will restart if error recov- ers. Integrated control not communicating. Covers hardware errors (flame sense cir- cuit faults, pin shorts, etc.).
- SL280UHV
Control failed self-check, internal error, failed hardware. Will restart if error recov- ers. Integrated control not communicating. Covers hardware errors (flame sense cir- cuit faults, pin shorts, etc.).
- SL297UHNV
Control failed self-check, internal error, failed hardware. Will restart if error recov- ers. Integrated control not communicating. Covers hardware errors (flame sense cir- cuit faults, pin shorts, etc.).
- SLP98UHV
Control failed self−check, internal error, failed hardware. Will restart if error recovers. Integrated furnace control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
- SLP99UHV
Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated furnace control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).
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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