Error Code NO LED

Goodman GMSS920803BN Error Code NO LED: No power to furnace or internal control fault

TL;DR

No power to furnace or internal control fault

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 NO LED Mean?

No power to furnace or internal control fault

Common Causes

Cause	Likelihood	DIY?
No 115 volt power to furnace	Most common	✗ Call a pro →
No 24 volt power to integrated control module	Common	✗ Call a pro →
Manual disconnect switch OFF or door switch open	Common	✗ Call a pro →
24 volt wires improperly connected or loose	Uncommon	✗ Call a pro →
Blown fuse or circuit breaker	Uncommon	✗ Call a pro →
Integrated control module has an internal fault	Uncommon	✗ Call a pro →

When to Call a Professional

Contact a licensed HVAC technician if:

Basic troubleshooting did not resolve the error
You smell gas at any point during the process
You are not comfortable working around gas lines or electrical components
The unit needs a gas valve, control board, or motor replacement

Sources

Goodman GMSS9 Series Service Instructions Manual