Error Code LED Steady On (Continuous)
Info

Goodman GMSS920803BN Error Code LED Steady On (Continuous): Normal Operation

TL;DR
Your Goodman GMSS920803BN is operating normally. The steady LED indicates no faults are present.
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 (Continuous) Mean?

A steady (continuously on) LED on the Goodman GMSS920803BN control module indicates normal operation. The furnace is either actively heating or standing by and ready to respond to a thermostat call. No fault codes are present in the system.

The integrated control module uses a single LED to communicate the furnace's status. When the LED is solid and not flashing, everything is functioning as designed. The furnace will cycle on and off as needed to maintain the temperature set on your thermostat.

No action is required when you see this status. If you are experiencing a heating problem despite the LED showing normal operation, the issue may be with the thermostat, ductwork, or another component outside of the furnace control system.

Contact a licensed HVAC technician if any of these apply:

Sources

  1. Installation Instructions for *MSS9* & *CSS9* Single-Stage Gas Furnace

✓ Verified against manufacturer service manual — March 2026