How do I fix error code COMP_MOTOR_LOCKED on my Samsung RF23M8070SR?

1. undefined: Check voltage of R308 on inverter board — expect 0.09Ω; short or open is a fault 2. undefined: Check both terminals of C103 for stable voltage 3. undefined: Check input line voltage stability 4. undefined: If circuit checks pass, inspect compressor and refrigerant cycle

Samsung RF23M8070SRRefrigerator

Error Code COMP_MOTOR_LOCKED

Compressor motor is mechanically jammed or not spinning at proper speed

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: Inverter LED blinks 3 times

What This Means

Compressor mechanical seizure (locked rotor); Compressor running below 1000 RPM for more than 5 seconds; Sudden large change in input voltage; Bad value or solder at R308 on inverter board; Unstable voltage at C103 capacitor on inverter board

What actually causes this:

The compressor is seized or the speed control circuit has detected the motor is not spinning at the right RPM.

First Thing to Check

Wait 10 minutes and try cycling power — if the compressor starts briefly then stops again with 3 blinks, the compressor itself is likely failing.

Parts Involved

CompressorInverter PCBResistor R308Capacitor C103

How to Fix

1
Check voltage of R308 on inverter board — expect 0.09Ω; short or open is a fault
2
Check both terminals of C103 for stable voltage
3
Check input line voltage stability
4
If circuit checks pass, inspect compressor and refrigerant cycle