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Weak airflow - Energy saving fan

Airflow is weak or stops — Fan control for energy saving activated

Fujitsu · Air Conditioners

What does Weak airflow - Energy saving fan mean?

If 'Fan control for energy saving' is enabled, the indoor unit fan may temporarily stop during cooling operation to conserve energy, leading to weak or stopped airflow.

Common Causes

  • The energy-saving fan control feature is active on the unit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the remote controller settings for any active energy-saving fan control.

  2. 2

    Cancel the 'Fan control for energy saving' to restore normal fan operation.

  3. 3

    Refer to page 7 of the manual for instructions on how to cancel this function.

Browse all codes in this manual (118)
Verified technical data. Last updated: April 2026

Related Faults

11Error 11 — Serial communication error (Indoor unit not sending signal)12Error 12 — Wired Remote Controller Communication Error18Error 18 — External communication error
Source: Fujitsu Air Conditioners
Open Manual (Page 14)Search more codes in this manual