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Samsung Refrigerators2018–present

Error Code 13

Humidity sensor is not responding

Moderate

Address soon - your appliance may not work properly

Also displayed as: 13C

What This Means

Connector not seated at Main PCB CN30 pins 7 and 9; Wire harness damaged or disconnected; Humidity sensor defective; Main PCB defective

What actually causes this:

Humidity sensor connector loosened or sensor failed

First Thing to Check

Look for condensation on the fridge door — excessive moisture indicates humidity sensor issue

Parts Involved

Humidity SensorFrench HeaterMain PCB CN30 Connector

How to Fix

  1. 1

    1. Locate humidity sensor near fridge compartment

  2. 2

    2. Inspect CN30 connector pins 7 and 9

  3. 3

    3. Measure voltage — normal 4.1V to 0.8V

  4. 4

    4. Reseat connector firmly

  5. 5

    5. Power on and check if error clears

  6. 6

    6. If voltage abnormal, replace 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

1

Freezer temperature sensor malfunction

6

Room temperature sensor not working

14

Ice maker temperature sensor failure

2

Fridge temperature sensor is not responding

9

Convertible zone temperature sensor failure

15

Ice storage area temperature sensor malfunction

4

Freezer defrost sensor is faulty

11

Convertible zone defrost sensor malfunction

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