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Trane S8X2D120M5PSAB Error Codes

Updated · by Aurora Star Tech Inc.

Trane S8X2D120M5PSAB error codes and diagnostic codes (also listed as S8X2D120M5P). The S8X2D120M5PSAB is a Trane furnace in the Trane S8X2 series.

Homeowner with a furnace problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Trane S8X2D120M5PSAB error codes list

CodeMeaningSeverity
E01Furnace control internal failureHigh
E04Open limit (main limit, rollout or reverse airflow)High
E05Flame sensed when no flame should be presentCritical
E08Low flame signal (still running)Low
E2.1Ignition retries exceeded - flame never proven (1 hour lockout)High
E2.2Flame recycles exceeded - flame lost after lighting (1 hour lockout)High
E2.31st stage gas valve not powered when it should be (10 times)High
E3.11st stage pressure switch (PS1) closed when it should be openMedium
E3.21st stage pressure switch (PS1) open when it should be closedMedium
E3.32nd stage pressure switch (PS2) closed when it should be openMedium
E3.42nd stage pressure switch (PS2) open when it should be closedMedium
E6.1120 V polarity reversedMedium
E6.2Ground not detectedMedium
E6.3Igniter open or igniter relay faultHigh
E7.11st stage gas valve (MVL) powered with no callCritical
E11Gas valve relay / valve circuit faultHigh
E12Control fuse openMedium

Troubleshooting the S8X2D120M5PSAB

Trane S8X2D120M5PSAB specs and setup data

All Trane Furnace error codes →

Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

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