What does error code 42E mean on a Samsung refrigerators?

Secondary ice maker sensor is disconnected or faulty Sensor connector not seated at CN30; Open or short circuit

How do I fix error code 42E on a Samsung refrigerators?

1. undefined: Measure voltage between Main PCB CN30 pins 8 and 13; should be within 4.5V–1.0V 2. undefined: Inspect connector and sensor wire

Samsung Refrigerators2023–present

Secondary ice maker sensor is disconnected or faulty

Moderate

Address soon - your appliance may not work properly

Also displayed as: 42E

Sensor connector not seated at CN30; Open or short circuit

What actually causes this:

An ice-making temperature sensor has an open connection — the ice maker can't complete its freeze cycle.

Press firmly on all ice maker-related connectors at the Main PCB to reseat them.

Ice Maker sensor (secondary)Main PCB CN30 pins 8-13

1
Measure voltage between Main PCB CN30 pins 8 and 13; should be within 4.5V–1.0V
2
Inspect connector and sensor wire

Samsung RF23 Series Refrigerators (2023) (2023–present)

Service manual exact match: RF23K*Service manual exact match: RF23J*Service manual exact match: RF23J*/RF23K

Freezer defrost sensor has an open or short circuit

Fridge compartment temperature sensor is faulty or disconnected

Fridge defrost sensor is open or shorted

Freezer temperature sensor has failed or lost connection

Ambient temperature sensor has failed or is disconnected

Freezer fan motor stopped or lost feedback signal

Cool Select Room fan has stopped or lost feedback

Internal board communication chip has failed

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