Error Code A
Info

Lennox EL296UHV Error Code A: CFM Setting Display

TL;DR
Your Lennox EL296UHV is displaying the current airflow (CFM) setting for the indoor blower. This is informational, not an error.
Disclaimer
This article is for informational purposes only and does not guarantee the accuracy or completeness of the information provided. Always turn off power and gas supply before attempting any repairs. If you smell gas, leave immediately and call your gas company. Consult a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk.

What Does Code A Mean?

The letter A on the Lennox EL296UHV seven-segment display indicates that the system is showing the current cubic feet per minute (CFM) airflow setting for the indoor blower motor. The display cycles through the letter A followed by the CFM value for the active operating mode.

The EL296UHV uses a variable-speed ECM blower motor with programmable airflow settings for each operating mode (heating, cooling, fan only). The A display lets technicians and homeowners see which CFM setting is currently selected. The value shown corresponds to the configured airflow for whatever mode the system is operating in.

This is purely an informational display. No action is needed. The airflow settings are typically configured during installation by the HVAC contractor based on the duct system design and equipment sizing.

When to Call a Professional

Contact a licensed HVAC technician if:

Sources

  1. Lennox EL296UHV Unit Information (Corp. 1125-L5)

✓ Verified against manufacturer service manual — March 2026