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Troubleshooting code

Back to all A951X080BU4SA error codes

Trane A951X080BU4SA E11 troubleshooting

Internal gas valve relay or valve error. 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

E11: Internal gas valve relay or valve error

The RunTru by Trane A951X service-facts error-code table identifies E11 as a gas valve relay or gas-valve energizing error.

System area
Gas valve control
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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Find the cause of warm air from a central AC system and restore proper cooling where possible.

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Diagnose an air conditioner that runs but does not provide expected cooling.

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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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E11 questions

What does E11 mean on a Trane A951X080BU4SA?

The RunTru by Trane A951X service-facts error-code table identifies E11 as a gas valve relay or gas-valve energizing error.

What Trane message is associated with E11?

The Trane source used for this page associates E11 with "Internal gas valve relay or valve error". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does E11 point to?

This code is grouped under gas valve control in the source-backed Trane troubleshooting data.

Which Trane documentation supports this E11 page?

Source-backed RunTru by Trane A951X-SF-1C-EN service facts error-code table for A951X furnaces.

Is E11 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.

Does E11 involve a control, board, drive, or module?

The Trane source row points to gas valve 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 E11 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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