Hollow cubes form when the outer shell freezes but there is not enough water—or enough freezing time—to create a solid cube.
What may be involved
- Low or restricted water fill
- Clogged filter or supply restriction
- Water inlet valve problem
- Freezer temperature too warm
- Airflow directed incorrectly around the ice maker
- Ice maker thermostat or control issue
Confirm the freezer is maintaining its recommended temperature and that the filter is installed correctly. Model-specific fill testing can identify whether the issue is water supply or the ice maker itself.