An ice maker that stops producing, turns out hollow cubes, or freezes up is a common Williamsburg request, where built-in and gourmet ice machines get heavy use. The fault usually traces to water supply, the freeze-and-harvest cycle, or scale.
Notes by Brand
The same symptom shows up differently across brands. Here is how we approach ice maker not working on the units we service most:
- Sub-Zero: We check the fill tube for a freeze-up first, then the inlet valve and the module. UC ice drawers and built-in makers share these failure points.
- Scotsman: Scale leads the list. A cleaning light means it is time to descale. We run a full cleaning cycle and verify water pressure.
- Wolf: Wolf does not build ice machines, so a call here means a paired Sub-Zero or a separate unit, which we diagnose directly.
- KitchenAid: We test the fill tube, inlet valve, and optics. Small or hollow cubes point to low water flow or a partial freeze-up.
- Thermador: We check the inlet valve, fill level, and harvest cycle. Built-in makers slow down from scale in hard-water areas.
- True Residential: We verify water supply and the harvest cycle. Gourmet ice modules respond well to regular descaling.
- Viking: We check the inlet valve, fill tube, and module. A frozen fill tube stops production outright.
Symptoms, Causes & Checks
| Symptom | Likely Cause | What We Check |
|---|---|---|
| No water | A frozen fill tube or a failed inlet valve | Thaw and clear the tube, test the valve and pressure |
| Small or hollow cubes | Low water flow or scale | Check pressure and descale the unit |
| Cleaning light | A descale reminder is active | Run a full cleaning cycle and reset |
Safety first: If the fill tube is frozen, do not force ice or use a sharp tool near the mold. Turn the ice maker off and book service to thaw and diagnose it safely.
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