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Troubleshooting code

Back to all 5TWV0X48A1 error codes

Trane 5TWV0X48A1 Alert 106.01 troubleshooting

External shutdown switch open. 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

Alert 106.01: External shutdown switch open

The Trane variable-speed alert table identifies EXT SW OPEN when the external shutdown switch is active and the T3/T4 circuit is open.

System area
External shutdown circuit
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.

Alert 106.01 questions

What does Alert 106.01 mean on a Trane 5TWV0X48A1?

The Trane variable-speed alert table identifies EXT SW OPEN when the external shutdown switch is active and the T3/T4 circuit is open.

What Trane message is associated with Alert 106.01?

The Trane source used for this page associates Alert 106.01 with "External shutdown switch open". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does Alert 106.01 point to?

This code is grouped under external shutdown circuit in the source-backed Trane troubleshooting data.

Which Trane documentation supports this Alert 106.01 page?

Source-backed Trane 5T-V0X-SF-1B-EN Service Facts variable-speed alert-code table for 5TWV0X/5TTV0X outdoor units.

What information should be captured for Alert 106.01 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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