Trane | Furnaces

Error Code Solid LED (Not Blinking)

Troubleshooting guide for the Trane Furnaces system fault Solid LED (Not Blinking).

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.

System Diagnosis

Control board fault (malfunction).

Potential Causes & Solutions

  • Turn the furnace power off and on to reset.
  • If the LED stays solid, inspect furnace wiring and the transformer; call a technician if issue persists.

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