What It Means
- Combustion air inducer calibration failure
- SLP98UHV, SLP99UHV: Unable to perform successful pressure switch calibration.
Lennox Ducted Heating
Lennox Error Code E228
Ducted Heating
E228 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
Combustion air inducer calibration failure
6 models
EL280UHEK, EL280UHEK(X), EL297UHEK, SL280DFNV, SL280UHV, SL297UHNV
Gas furnace (indoor)
How it shows
- Integrated control 7-segment display: E228
Unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections. Resumes normal operation after fault is cleared.
Applicable models & manual sources
- EL280UHEK
Combustion air inducer calibration failure
EL280UHEK, EL280UHEK(X)
- EL297UHEK
Combustion air inducer calibration failure
- SL280DFNV
Combustion air inducer calibration failure
- SL280UHV
Combustion air inducer calibration failure
- SL297UHNV
Combustion air inducer calibration failure
Unable to perform successful pressure switch calibration.
Models: SLP98UHV, SLP99UHV
How it shows
- Integrated control 7-segment display: E228
Retry after 300 seconds. Error counter cleared when exit- ing lockout, unable to perform pressure switch calibration. Check vent system and pressure switch wiring connec- tions.
Other manual wording
SLP99UHV
Retry after 300 seconds. Error counter cleared when exiting lockout, unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections.
Applicable models & manual sources
- SLP98UHV
Unable to perform successful pressure switch calibration.
- SLP99UHV
Unable to perform successful pressure switch calibration.
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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