Why is my Sub-Zero making small or hollow ice cubes?

Low water pressure, often from a clogged filter or partially closed valve, is the usual cause. Replacing the filter and checking the supply often fixes it.

My Midland ice maker makes tiny, hollow cubes. Is the ice maker broken?

Usually it is a water supply problem, often a clogged inlet valve or filter from well sediment. Replace the filter first. If cubes stay small, we test and replace the valve.

Should I add a filter for my Mount Pleasant well before you replace the ice maker valve?

A whole-house sediment filter helps protect the new valve, and a water treatment company can size it. We can replace the valve either way and quote it before starting. The refrigerator's own filter should also be fresh.

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Sub-Zero Ice Maker Repair in Midland & Mount Pleasant, NC

Sub-Zero ice maker repair in Midland & Mount Pleasant, Cabarrus County. We diagnose first and agree the price before any work.

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Sub-Zero Ice Makers: What We Check First

Sub-Zero ice comes from two very different machines. Most refrigerators and freezers have an automatic ice maker inside the freezer compartment, fed by a water valve and line. Separately, Sub-Zero sells undercounter ice makers that produce clear ice in a dedicated cabinet, often installed in a bar, butler's pantry or outdoor kitchen. Undercounter units need a water supply, a drain, and either gravity drainage or a drain pump.

Clogged water filter or low pressure reducing ice production
Frozen fill line stopping the in-freezer ice maker
Scale buildup on undercounter ice maker evaporators
Drain pump or drain line clog in undercounter installations

The full explanation, including what you can safely check yourself and when repair beats replacement, is in our Sub-Zero ice maker repair guide.

Sediment in a small valve

The water valve that feeds an ice maker has tiny passages and a fine screen, and well sediment clogs it faster than almost anything else in the house. The result is small, hollow or misshapen cubes, a dispenser that sputters, or no ice at all. Iron can discolor ice and stain the tray, and a clogged refrigerator filter adds to the restriction.

Replace the refrigerator's water filter if it has been in place a while, and check that the supply valve is fully open. If you have a whole-house filter on the well, see whether it needs changing too. After a power outage that stopped the well pump, air in the line can make the dispenser sputter for a while before it clears.

We test and replace the inlet valve, check the ice maker module and fill tube, and confirm the freezer is cold enough. Then we give you the price before work, and suggest filtration if sediment keeps clogging new parts. Midland is usually simpler to schedule than the far side of Mount Pleasant.