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Troubleshooting code

Back to all A801X080CM5SD error codes

Trane A801X080CM5SD E08 troubleshooting

Low flame current. 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

E08: Low flame current

The RunTru by Trane A801X furnace error-code table identifies E08 as low flame current that is still strong enough to allow operation.

System area
Flame sensing
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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Diagnose condensate drainage, pan, coil, and pump conditions that cause water around an AC system.

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Diagnose an AC system that does not start or respond to the thermostat.

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E08 questions

What does E08 mean on a Trane A801X080CM5SD?

The RunTru by Trane A801X furnace error-code table identifies E08 as low flame current that is still strong enough to allow operation.

What Trane message is associated with E08?

The Trane source used for this page associates E08 with "Low flame current". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does E08 point to?

This code is grouped under flame sensing in the source-backed Trane troubleshooting data.

Which Trane documentation supports this E08 page?

Source-backed RunTru by Trane 88-A801X003-1C-EN furnace error-code table for A801X furnaces.

Is E08 related to combustion or furnace safety controls?

The Trane source row places this code in a combustion, ignition, limit, flame, or pressure-switch safety context. These codes should be interpreted from the exact equipment board and documented flash pattern.

What information should be captured for E08 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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