An automatic residential refrigerator ice maker is instructed to stop making ice by a mechanical bail arm wire, an electronic optical sensor beam, or a digital feeler arm located inside or above the ice storage bin. When the ice bucket fills up completely to the top, the rising pile of ice cubes pushes the physical metal bail arm upward into the "up" position or breaks the invisible infrared light beam between the optical sensor eyes, signaling the control module that the bin is full. This safety mechanism halts the harvest cycle, water fill valve, and mold heater. You can troubleshoot icemaker jams easily by inspecting the bin. You can verify that your sensor is working correctly when lowering the arm or clearing ice blocks resumes normal production, while a lifted arm stops it.
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