What the code means
Err 67.01: Coil temperature sensor fault
The Trane variable-speed alert table identifies COIL T SENSE as a coil temperature sensor out-of-range, open, shorted, or missing condition.
Troubleshooting code
Back to all 4TWV0X24A1 error codes
Trane 4TWV0X24A1 Err 67.01 troubleshooting
Coil temperature sensor fault. Use this page to document the issue and prepare for service. GreenFlow should handle diagnosis for electrical, refrigerant, lockout, or recurring conditions.
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 67.01 questions
What does Err 67.01 mean on a Trane 4TWV0X24A1?
The Trane variable-speed alert table identifies COIL T SENSE as a coil temperature sensor out-of-range, open, shorted, or missing condition.
What Trane message is associated with Err 67.01?
The Trane source used for this page associates Err 67.01 with "Coil temperature sensor fault". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.
What system area does Err 67.01 point to?
This code is grouped under outdoor coil sensor in the source-backed Trane troubleshooting data.
Which Trane documentation supports this Err 67.01 page?
Source-backed Trane 4T-V0-SF-1Q-EN Service Facts variable-speed alert-code table for 4TWV0/4TTV0 outdoor units.
Is Err 67.01 a sensor-related alert?
Yes. The documented row connects Err 67.01 to outdoor coil 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 67.01 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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