Error Code Steady On
Info

Coleman DGAA056BDTA Error Code Steady On: Normal Operation

TL;DR
Your furnace is operating normally. The steady green LED confirms no faults and the system is running as expected.
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 Steady On Mean?

A steady green LED on the Coleman DGAA056BDTA indicates normal operation. The integrated ignition control is functioning properly and no fault conditions are present. This is the status you should see when the furnace is powered on and either actively heating or standing by.

The DGAA056BDTA uses a simple green LED diagnostic system visible through a clear view port in the blower compartment door. During normal operation, the LED remains steadily lit. Fault conditions are indicated by specific flash patterns (1 through 6 flashes, or rapid flashing), each separated by a 2-second off period. A steady light with no flashing confirms everything is operating within normal parameters.

If you are checking the LED because your home is not warm enough despite the furnace showing normal operation, the issue may be with the thermostat settings, ductwork, or the home's insulation rather than the furnace itself. Verify the thermostat is set correctly and that supply registers throughout the home are open and unobstructed.

Contact a licensed HVAC technician if any of these apply:

Sources

  1. Coleman DGAA and DGAH User's Information, Maintenance and Service Manual

✓ Verified against manufacturer service manual — March 2026