How do I fix error code COMP-MOTOR-CONSTRAINT on a Samsung refrigerators?

1. undefined: Check compressor wire connections at CN102 2. undefined: Verify resistance of R2 (0.09Ω) on PCB 3. undefined: Inspect MAIN PCB soldering 4. undefined: Check compressor and refrigeration cycle

Samsung Refrigerators2022–present

Error Code COMP-MOTOR-CONSTRAINT

Compressor motor is jammed or running at dangerously low speed

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: LED blinks per inverter protection table

What This Means

Locked rotor operating within 5 seconds; Compressor operating below 1000 RPM for more than 5 seconds; Large sudden input voltage change; Failed compressor or refrigeration cycle blockage

What actually causes this:

The compressor is unable to spin at the correct speed, usually because it is mechanically seized or there is a fault in the position sensing circuit.

First Thing to Check

Listen for the compressor humming loudly without running — that sound indicates a seized motor.

Parts Involved

Inverter compressor NF54M5151ARTT3MAIN PCB resistor R2 (0.09Ω)CN102

How to Fix

1
Check compressor wire connections at CN102
2
Verify resistance of R2 (0.09Ω) on PCB
3
Inspect MAIN PCB soldering
4
Check compressor and refrigeration cycle

This Error Applies To

Samsung RF25C5 Series Refrigerators (2022) (2022–present)

Service manual exact match: RF25C5151SR/AAService manual exact match: RF25C5151**Service manual exact match: RF25C5551**Service manual exact match: RF25C5551SR/AA