System Diagnosis
No power to furnace (control board not lit).
American Standard | Furnaces
Error Code No LED (Off)
Troubleshooting guide for the American Standard Furnaces system fault No LED (Off).
A
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
Potential Causes & Solutions
- Verify the furnace is plugged in and getting power.
- Check the circuit breaker and any blown fuses, and inspect wiring connections.
Diagnose with Confidence
Use the ACLogics AI assistant to walk through this error code step-by-step.
Included in Diagnosis Workflow
Ask
Upload nameplate & symptoms
Diagnose
AI identifies error No LED (Off)
Report
Generate professional PDF