What It Means
- SL280DFNV, SL297UHNV: Control internal communication problem.
- SLP98UHV, SLP99UHV: Failed internal control communication between microcontrollers.
Lennox Ducted Heating
Lennox Ducted Heating Error Code E126
Ducted Heating
E126 means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Control internal communication problem.
Models: SL280DFNV, SL297UHNV
How it shows
- Integrated control 7-segment display: E126
Hardware problem on the control. Cycle power on con- trol. Replace if problem prevents service and is persistent. Cleared 300 seconds after fault recovered.
Applicable models & manual sources
- SL280DFNV
Control internal communication problem.
- SL297UHNV
Control internal communication problem.
Failed internal control communication between microcontrollers.
Models: SLP98UHV, SLP99UHV
How it shows
- Integrated control 7-segment display: E126
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is persis- tent.
Other manual wording
SLP99UHV
Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is persistent.
Applicable models & manual sources
- SLP98UHV
Failed internal control communication between microcontrollers.
- SLP99UHV
Failed internal control communication between microcontrollers.
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?
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