What is the most common cause of refrigerator compressor failure?

The single most common cause of premature residential refrigerator compressor failure is restricted heat dissipation resulting from neglected, dirty condenser coils. Over months and years, pet hair, dust, and kitchen grease accumulate heavily over the condenser coils beneath or behind the refrigerator, acting like a thick insulation blanket that traps heat. This prevents the refrigerant gas from cooling properly before entering the expansion valve, forcing the compressor motor to run continuously under extreme thermal stress, high operating pressures, and excessive electrical current draws until the internal windings or overload relays burn out permanently. You can troubleshoot by inspecting condenser coils. You can verify that your maintenance prevents failure when semi-annual vacuuming and cleaning of the coils keep operating temperatures stable and extend compressor life.