Error Code ALL OFF

Goodman GMEC960803BN Error Code ALL OFF: No power to furnace or control board failure

TL;DR
No power to furnace or control board failure
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 ALL OFF Mean?

No power to furnace or control board failure

Common Causes

Cause Likelihood DIY?
Defective disconnect switch Most common ✗ Call a pro →
Defective door switch Common ✗ Call a pro →
No 115 volt power to furnace Common ✗ Call a pro →
No 24 volt power to control board Uncommon ✗ Call a pro →

When to Call a Professional

Contact a licensed HVAC technician if:

Sources

  1. Goodman GMEC96 Service Instructions Manual - Two Stage Furnace with Multi-Speed ECM Motor