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Burning smell/Smoke

Unit smells of burning or emits smoke — Immediate hazard

Fujitsu · Air Conditioners

What does Burning smell/Smoke mean?

If the air conditioner unit emits a burning smell or smoke, it indicates a serious internal problem that poses an immediate safety risk.

Common Causes

  • Internal electrical fault or component overheating.
  • Potential fire hazard.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Immediately stop the operation of the air conditioner.

  2. 2

    Disconnect all power supply by turning off the electrical breaker or unplugging the unit.

  3. 3

    Consult your dealer or authorized service personnel without delay.

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