Error code reference

Samsung Refrigerator Error Code 4

Freezer defrost sensor error

Freezer defrost sensor error - sensor housing fallen out in evaporator, contact failure, wire breakage, short-circuit, or inferior sensor; triggers when temp sensing is above 149°F/65°C or below -58°F/-50°C.

First step from the service manual

Check voltage between MAIN PCB CN30 #4 and #6 (should be within 4.7V~0.6V).

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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