An automatic residential refrigerator ice maker can overflow and spill water into the freezer compartment due to several common plumbing and electrical malfunctions. The most frequent cause is excessively high household water pressure forcing open the water inlet valve solenoid past its closing threshold, allowing water to keep rushing into the mold tray after it is already full. Another common culprit is a defective water inlet valve that fails to shut completely due to mineral scale or internal spring wear, or a misaligned ice maker assembly that tilts unevenly. You can troubleshoot water levels easily by inspecting the ice mold. You can verify that your corrective action is successful when replacing a worn water inlet valve, installing a water pressure regulator, or leveling the ice maker stops overflows and prevents large blocks of ice from forming.
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