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123

Error 123 — Indoor unit EVA OUT sensor error (Short or Open)

Samsung · AC & Climate Systems

What does 123 mean?

The EVA OUT temperature sensor for the indoor unit is experiencing a short circuit or an open connection, impacting temperature monitoring.

Common Causes

  • Damaged wiring to the EVA OUT sensor
  • Faulty EVA OUT sensor
  • Improper sensor mounting

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the wiring and connection of the EVA OUT sensor.

  2. 2

    Confirm the sensor is properly installed and secured.

  3. 3

    Check the sensor for any signs of physical damage.

  4. 4

    Professional inspection might be needed if the wiring appears intact.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

101Error 101 — Indoor unit communication error102Error 102 — Communication error between indoor and outdoor units108Error 108 — Repeated address setting
Source: Samsung AC & Climate Systems
Open Manual (Page 22)Search more codes in this manual