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C554

C554 - Gas leak error

Samsung · Air Conditioning

What does C554 mean?

The air conditioner has detected a potential refrigerant gas leak. This will severely impact cooling/heating performance and can cause damage.

Common Causes

  • Refrigerant line leak
  • Loose fittings
  • Damaged coils

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner immediately to prevent further damage.

  2. 2

    Do not attempt to operate the unit. A gas leak requires professional attention.

  3. 3

    Contact a qualified service technician for urgent inspection and repair.

Browse all codes in this manual (137)
Verified technical data. Last updated: April 2026

Related Faults

Abnormal displayAbnormal outdoor LED display - Error modeAll LEDs offAll outdoor unit LEDs off - No powerC101/C102C101 or C102 - Indoor to outdoor communication error
Source: Samsung Air Conditioning
Open Manual (Page 13)Search more codes in this manual