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.

Should I replace the saddle valve feeding my ice maker in a NoDa cottage?

Saddle valves can clog or leak over time, and a plumber can replace one with a standard shutoff valve. We can tell you whether the valve is restricting water to your ice maker.

My ice maker in a Plaza Midwood townhome stopped after a cold night. What happened?

If the fill tube froze, water cannot reach the ice maker. It may also be a supply line in an exterior wall. We check the tube, the inlet valve and the freezer temperature.

Sub-Zero Repair

Sub-Zero Ice Maker Repair in NoDa & Plaza Midwood, NC

Sub-Zero ice maker repair in NoDa & Plaza Midwood, Mecklenburg 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.

Water Supply Under Older Homes

In a mill cottage or bungalow, the refrigerator's water line often comes up through the floor from the crawl space. Old saddle valves, narrow tubing and fittings from earlier renovations can restrict flow, and a line exposed in a cold crawl space can freeze during a hard cold snap. When the ice maker gets too little water, cubes come out small or hollow, and production slows.

In newer townhomes, the supply is usually routed inside walls, and issues are more likely to be a clogged filter, a frozen fill tube or a faulty ice maker module. Door-mounted ice compartments on French-door models can also frost up and jam when their seal or fan falters.

Check the filter date, confirm the supply valve is open and make sure the ice maker is on. If the cubes taste stale, a filter change often helps too. The technician tests water pressure at the valve, the inlet valve and the module, and explains the repair before work.