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Troubleshooting code

Back to all UHMC100CCV4 error codes

Trane UHMC100CCV4 Flashing Slow troubleshooting

Normal - no call for heat. 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

Flashing Slow: Normal - no call for heat

The Trane 18-CD29D1-14-EN integrated furnace control flash-code table identifies slow flashing as normal operation with no call for heat.

System area
Integrated furnace control
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.

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Flashing Slow questions

What does Flashing Slow mean on a Trane UHMC100CCV4?

The Trane 18-CD29D1-14-EN integrated furnace control flash-code table identifies slow flashing as normal operation with no call for heat.

What Trane message is associated with Flashing Slow?

The Trane source used for this page associates Flashing Slow with "Normal - no call for heat". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does Flashing Slow point to?

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

Which Trane documentation supports this Flashing Slow page?

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

Is Flashing Slow 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 Flashing Slow entry before interpreting the fault.

Does Flashing Slow involve a control, board, drive, or module?

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

What information should be captured for Flashing Slow 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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