Samsung Refrigerator Error Code COMP UNDER VOLTAGE ERROR

This error means the compressor inverter circuit has detected that its input voltage is too low to safely operate the compressor. The inverter board monitors incoming power through a sensing circuit that includes resistors R309 through R312 and capacitor C308. The fault can originate from failed components on the inverter board or from genuinely low voltage coming from the home electrical supply. The compressor will not run while this error is active.

No, the refrigerator's compressor is not running while this error is active, which means the unit cannot maintain safe food storage temperatures. Food spoilage is a risk if the error persists. Address the fault promptly and transfer perishables to a backup cooler if the repair will take more than a few hours.

Repair costs vary depending on the root cause. If the issue is a failed inverter board component, parts alone can range from a few dollars for individual resistors or capacitors to roughly $100 to $300 or more for a full inverter board replacement. Adding professional labor typically brings the total repair cost to somewhere between $150 and $450. If the problem is a faulty household outlet or wiring, an electrician's service call is an additional consideration.

Some causes are within reach of a knowledgeable DIYer. You can check that the refrigerator is plugged directly into a properly rated 120V outlet, measure the outlet voltage with a multimeter, and inspect for tripped breakers or loose connections. Diagnosing and replacing inverter board components such as resistors or capacitors requires electronics knowledge and appropriate tools, so that work is better suited to a technician.

A power reset by unplugging the unit for a few minutes may temporarily clear the error, but it will return if the underlying cause has not been corrected. If the fault is due to a failed resistor, capacitor, or persistent low supply voltage, the error will reappear once the refrigerator restarts and the inverter detects the problem again.