System Diagnosis
Duplicate outdoor temp sensor detected.
Trane | AC and Heat Pump
Error Code Red 15 Flashes
Troubleshooting guide for the Trane AC and Heat Pump system fault Red 15 Flashes.
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
- Remove or disconnect any redundant outdoor sensor if two are installed.
- If only one sensor exists, try resetting power; continued errors may require technician support.
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