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Troubleshooting code

Back to all UHMC100CCV4 error codes

Trane UHMC100CCV4 Continuous OFF troubleshooting

Check power. 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

Continuous OFF: Check power

The Trane 18-CD29D1-14-EN integrated furnace control flash-code table identifies continuous OFF as check power.

System area
Integrated furnace control power
Service level
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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.

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Continuous OFF questions

What does Continuous OFF mean on a Trane UHMC100CCV4?

The Trane 18-CD29D1-14-EN integrated furnace control flash-code table identifies continuous OFF as check power.

What Trane message is associated with Continuous OFF?

The Trane source used for this page associates Continuous OFF with "Check power". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does Continuous OFF point to?

This code is grouped under integrated furnace control power in the source-backed Trane troubleshooting data.

Which Trane documentation supports this Continuous OFF page?

Source-backed Trane 18-CD29D1-14-EN integrated furnace control flash-code table for XV80-style gas furnaces.

Is Continuous OFF an LED or flash-pattern code?

Yes. The Trane source row for this item is based on a displayed LED or flash pattern. Count the pattern exactly and compare it with the documented Continuous OFF entry before interpreting the fault.

Does Continuous OFF involve a control, board, drive, or module?

The Trane source row points to integrated furnace control power. Record the exact code and visible alert text before any reset so the control history is not lost.

What information should be captured for Continuous OFF 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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