Samsung Refrigerator Error Code Comp Motor Constraint Error

This error means the refrigerator's control board has detected that the compressor rotor is locked or constrained and cannot rotate. The compressor is the core component of the refrigeration cycle, and if it cannot spin, the fridge will not cool. The error is designed to protect the system from electrical and thermal damage caused by a stalled motor.

It is not recommended. A constrained compressor motor draws high current and generates excess heat, which can damage other electrical components and create a fire or overheating risk. The refrigerator will also not cool properly, putting food safety at risk. Discontinue use or unplug the unit until the fault is diagnosed and resolved.

Repair costs vary widely depending on the root cause. Fixing a wiring connection issue may cost relatively little in labor. Replacing a compressor, which is often the ultimate cause of this error, typically runs between $300 and $700 or more including parts and labor, depending on the model and service rates in your area. If the refrigerator is older, a cost-versus-replacement comparison is worth considering.

Some steps are DIY-friendly, such as inspecting the compressor wiring connections for looseness or corrosion and ensuring the refrigerator has been off long enough for pressures to equalize. However, diagnosing refrigerant pressure issues and replacing the compressor or internal components requires certified technician tools and expertise. Start with the wiring inspection before calling for service.

A power reset may temporarily clear the error code, but the fault will return if the underlying problem is not corrected. If the compressor rotor is mechanically seized or the wiring is damaged, cycling power will not resolve the condition. A reset is only useful as a diagnostic step to confirm whether the error is persistent.