When a residential refrigerator automatic ice maker malfunctions and appears to produce only a single ice cube or very sparse batches during each harvest cycle, the issue is typically caused by a severely restricted water supply, a frozen fill tube, or a mechanical jam in the ejector rake mechanism. If an ice blockage restricts water from entering most of the mold compartments while leaving one section wet, only a single cube forms. You can troubleshoot mechanical and water flow easily by inspecting the mold tray. You can verify that your corrective action is successful when clearing fill tube ice, replacing a clogged water filter, or thawing the mold tray restores full water filling across all compartments, producing a complete batch of ice cubes.
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