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C500

C500 - Heatsink over temperature error

Samsung · Air Conditioning

What does C500 mean?

The heatsink, which dissipates heat from power components, has become too hot. This indicates potential overheating of internal electronics.

Common Causes

  • Blocked airflow around the outdoor unit
  • Dirty heatsink
  • Faulty fan
  • High ambient temperature
  • Internal electronic component failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner and allow it to cool down for at least 30 minutes.

  2. 2

    Check that the outdoor unit's fan is spinning freely and not obstructed by debris.

  3. 3

    Ensure there is adequate space around the outdoor unit for proper airflow.

  4. 4

    Restart the unit. If the error reoccurs, contact a qualified service technician.

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