What It Means
- SL280DFNV, SL297UHNV: Heat air flow restricted below the minimum.
- SLP98UHV, SLP99UHV: Restricted air flow - Cubic feet per minute is lower than what is needed for minimum firing rate.
Lennox Ducted Heating
Lennox Error Code E291
Ducted Heating
E291 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
Heat air flow restricted below the minimum.
Models: SL280DFNV, SL297UHNV
How it shows
- Integrated control 7-segment display: E291
Check for dirty filter and air flow restriction. Check blower performance. 1-hour soft lockout. Cleared when heat call finishes successfully.
Applicable models & manual sources
- SL280DFNV
Heat air flow restricted below the minimum.
- SL297UHNV
Heat air flow restricted below the minimum.
Restricted air flow - Cubic feet per minute is lower than what is needed for minimum firing rate.
Models: SLP98UHV, SLP99UHV
How it shows
- Integrated control 7-segment display: E291
Check for dirty filter, unit air flow restriction, blower performance.
Applicable models & manual sources
- SLP98UHV
Restricted air flow − Cubic feet per minute is lower than what is needed for minimum firing rate.
- SLP99UHV
Restricted air flow - Cubic feet per minute is lower than what is needed for minimum firing rate.
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.
