Samsung Refrigerator Error Code Comp under voltage

It means the refrigerator detected that the AC voltage supplied to the compressor circuit dropped below 53V, which is below the minimum needed for safe compressor operation. The system triggers this fault to protect the compressor from damage caused by running under insufficient voltage. The issue could stem from a failed sensing resistor on the control board, a problem with the home electrical supply, or a defective inverter board.

A reset may temporarily clear the error code, but it will return if the underlying cause is not repaired. If the voltage sensing circuit or actual supply voltage remains outside the acceptable range, the board will re-trigger the fault. A reset is useful for confirming whether the fault is intermittent, but it is not a fix.

Repair costs vary depending on the root cause. Replacing a single resistor like R513 is a low-cost repair if done by a technician comfortable with board-level work. If the full inverter or compressor control board needs replacement, parts and labor typically range from $150 to $400 or more depending on your model and region. Getting a diagnosis first will help determine whether a board-level repair or full board replacement is necessary.

Start by checking the resistance of R513 on the compressor control board, as a shorted or open R513 is the first recommended diagnostic step. Next, measure the AC voltage at the wall outlet to confirm your home supply is adequate. If the outlet voltage is normal and R513 is good, the inverter board or another power path component may need to be replaced.

The error itself is a protective shutdown, so the refrigerator is responding correctly by stopping the compressor. However, if the cause is a wiring issue, faulty outlet, or damaged power cord, those conditions can present electrical hazards and should be inspected promptly. Have a qualified technician evaluate the power supply path if you are unsure.