Error Code LED Steady On
Info

Ruud UGRA-07EMAES Error Code LED Steady On: Normal Operation

TL;DR
Your furnace is powered on and operating normally with no faults detected by the control board.
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 LED Steady On Mean?

A steady green status LED on the Ruud UGRA-07EMAES control board confirms that the Integrated Furnace Control (IFC) is receiving power and the microprocessor is functioning correctly. No fault conditions have been detected. The furnace is either actively running a heating cycle or idle in standby mode, waiting for the thermostat to call for heat.

If your home is not warming up despite this normal status indication, the issue is likely with the thermostat or the connection between the thermostat and the furnace. Confirm that your thermostat is set to "Heat" mode, the temperature setpoint is above the current room temperature, and the thermostat has working batteries if it uses them.

This status requires no maintenance or service. It is the expected LED state during normal furnace operation.

Contact a licensed HVAC technician if any of these apply:

Sources

  1. Rheem RGRA and RGSA Series Installation Instructions

✓ Verified against manufacturer service manual — March 2026