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904

Display 904 — DHW Tank Temperature Sensor Error

Samsung · Gen 6 Fault Code List.pdf Energy Lab

What does 904 mean?

This error indicates a malfunction with the temperature sensor for the Domestic Hot Water (DHW) tank.

Common Causes

  • Faulty DHW tank temperature sensor
  • Wiring problem to the sensor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the wiring to the DHW tank temperature sensor for loose connections or damage.

  2. 2

    Ensure the sensor is properly installed within the tank.

  3. 3

    If the sensor is determined to be faulty, it requires replacement.

  4. 4

    Contact a qualified technician for assistance.

Browse all codes in this manual (52)
Verified technical data. Last updated: April 2026

Related Faults

101Display 101 — Wire connection error120Display 120 — Zone 2 room temperature sensor error121Display 121 — Zone 1 room temperature sensor error
Source: Samsung Gen 6 Fault Code List.pdf Energy Lab
Open Manual (Page 45)Search more codes in this manual