Error Code LED On (Continuous On)
Carrier 59SC2B Error Code LED On (Continuous On): Normal Operation - No Call for Heat
TL;DR
LED is continuously on. Control has 24VAC power and is operating normally with no active call for heat. 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 On (Continuous On) Mean?
LED is continuously on. Control has 24VAC power and is operating normally with no active call for heat.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Normal standby operation - thermostat is not calling for heat | Most common | — N/A |
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