What It Means
- SLP98UHV, SLP99UHV: Soft lockout - Exceeded maximum number of calibration retries.
- SL280DFNV, SL297UHNV: Watchguard calibration failure.
Lennox Ducted Heating
Lennox Error Code E276
Ducted Heating
E276 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
Soft lockout - Exceeded maximum number of calibration retries.
Models: SLP98UHV, SLP99UHV
How it shows
- Integrated control 7-segment display: E276
See E 228.
Applicable models & manual sources
- SLP98UHV
Soft lockout − Exceeded maximum number of calibration retries.
- SLP99UHV
Soft lockout - Exceeded maximum number of calibration retries.
Watchguard calibration failure.
Models: SL280DFNV, SL297UHNV
How it shows
- Integrated control 7-segment display: E276
Unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections. 1-hour soft lockout. Clears when calibration has finished successfully.
Applicable models & manual sources
- SL280DFNV
Watchguard calibration failure.
- SL297UHNV
Watchguard calibration failure.
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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