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Trane 5TWV8X48A1 Err 67.04 troubleshooting

Discharge temperature sensor fault in cooling. Use this page to document the issue and prepare for service. GreenFlow should handle diagnosis for electrical, refrigerant, lockout, or recurring conditions.

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What the code means

Err 67.04: Discharge temperature sensor fault in cooling

The Trane variable-speed alert table identifies DOME T SENSE as a discharge temperature sensor fault in cooling mode.

System area
Compressor discharge sensor
Service level
Service recommended

Safe checks before calling

  • Confirm the thermostat is on, set correctly, and calling for heating or cooling.
  • Check the air filter and visible return-air path for obvious airflow restrictions.
  • Look around the outdoor unit for leaves, snow, ice, or other visible obstructions without opening the cabinet.
  • Take photos of the thermostat, outdoor unit, nameplate, and any visible flash pattern before scheduling service.

When to stop and call GreenFlow

Call GreenFlow if the code repeats, the system is locked out, heating or cooling is not restored, there is ice buildup, electrical odor, unusual noise, or any issue involving pressure switches, sensors, wiring, refrigerant, reversing-valve operation, or warranty coverage.

Share the visible code, model and serial number if available, photos, current symptoms, and whether the issue affects heating, cooling, or both.

Err 67.04 questions

What does Err 67.04 mean on a Trane 5TWV8X48A1?

The Trane variable-speed alert table identifies DOME T SENSE as a discharge temperature sensor fault in cooling mode.

What Trane message is associated with Err 67.04?

The Trane source used for this page associates Err 67.04 with "Discharge temperature sensor fault in cooling". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does Err 67.04 point to?

This code is grouped under compressor discharge sensor in the source-backed Trane troubleshooting data.

Which Trane documentation supports this Err 67.04 page?

Source-backed Trane 5T-V8X-SF-1C-EN Service Facts variable-speed alert-code table for 5TWV8X/5TTV8X outdoor units.

Is Err 67.04 a sensor-related alert?

Yes. The documented row connects Err 67.04 to compressor discharge sensor. Sensor-related alerts should be interpreted by the exact code and operating mode rather than grouped with unrelated sensor faults.

What information should be captured for Err 67.04 before clearing alerts?

Capture the exact code, any displayed alert text, the model and serial number, thermostat or control status, operating mode, symptoms, and photos of the display or LED pattern before the alert history is cleared.

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