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Samsung Refrigerators2018–present

Error Code 16

Internal humidity sensor not responding

Moderate

Address soon - your appliance may not work properly

Also displayed as: 16C

What This Means

Connector not seated at Main PCB CN30 pins 7 and 8; Wire harness damaged; Humidity sensor defective; Main PCB defective

What actually causes this:

Humidity sensor connector loosened or sensor element failed due to moisture

First Thing to Check

Check if fridge interior has unusual condensation patterns

Parts Involved

Fridge Humidity SensorMain PCB CN30 Connector

How to Fix

  1. 1

    1. Unplug and inspect CN30 connector pins 7 and 8

  2. 2

    2. Measure voltage — expected 4.1V to 0.8V

  3. 3

    3. Reseat connector and power on

  4. 4

    4. Check if error clears

  5. 5

    5. If voltage out of range, replace fridge humidity sensor

This Error Applies To

Samsung RF22N9781 Series Refrigerators (2018) (2018–present)

Service manual exact match: RF22N9781Service manual exact match: RF28N9780

Related Error Codes

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2

Fridge temperature sensor is not responding

9

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4

Freezer defrost sensor is faulty

11

Convertible zone defrost sensor malfunction

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