Error Code H
Info Lennox EL296UHV Error Code H: Gas Heat Stage
TL;DR
Your furnace is operating normally in gas heating mode. The display shows the current heating stage. 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 H Mean?
The "H" display on your Lennox EL296UHV indicates the furnace is actively running in gas heat mode. This is a normal operating status, not an error code.
The EL296UHV is a two-stage gas furnace. When you see this code, the thermostat has called for heat and the furnace is running its gas burner. The furnace may operate in first stage (lower output for efficiency) or second stage (full output for maximum heating) depending on demand.
No action is required when this code appears. The display will return to idle mode once the thermostat's temperature setpoint is reached and the furnace completes its heating cycle.
When to Call a Professional
Contact a licensed HVAC technician if:
- Your furnace displays this code but your home is not getting warm
- The furnace seems stuck in one heating stage and never reaches temperature
- You notice unusual smells or sounds during gas heat operation
Sources
- Unit Information - icomfort ENABLED EL296UHV(X) Series Units
✓ Verified against manufacturer service manual — March 2026