A Sub-Zero ice maker usually stops making ice because it's turned off, the water supply is closed or kinked, the filter is clogged, the fill tube is frozen, the water valve or ice maker module has failed, or the freezer is too warm. Standalone UC-15I units also stop because of scale buildup, water pump or drain pump failures.
This applies to both the automatic ice makers inside Sub-Zero freezers and standalone UC-15I clear-ice makers.
Check These First (5 Minutes, No Tools)
- Make sure the ice maker is turned on (check for an ice maker off icon).
- Confirm the water supply valve is fully open.
- Replace the water filter if it's overdue.
- Check the freezer is at about 0°F.
- Make sure the bin sensor or arm isn't blocked by ice.
- For UC-15I: run a cleaning cycle if the clean light is on.
Most Common Causes
| Cause | What happens | Fix |
|---|---|---|
| Water supply / filter | Not enough water pressure to fill. | DIY |
| Frozen fill tube | Water freezes before reaching the mold. | Pro |
| Water inlet valve | Valve doesn't open. | Pro |
| Ice maker module | No harvest cycle. | Pro |
| Warm freezer | Ice maker waits for cold mold. | Pro |
| Scale buildup (UC-15I) | Water can't flow over the evaporator properly. | DIY / Pro |
| Water / drain pump (UC-15I) | Water isn't circulated or drained. | Pro |
How We Fix It
We test water flow, valve and module operation, check freezer temperatures, and on standalone units descale and test the pumps and sensors.
When to Call a Technician
If the basic checks above don't solve it within a few hours, or if you hear repeated clicking, see an alarm or service indicator, or notice water under cabinetry, call us at (725) 237-7399. The $75 service call is credited toward your repair, repairs carry a 1-year parts and 180-day labor warranty, and we stock the Sub-Zero parts behind most of these failures.
Typical Cost
| Repair | Typical range |
|---|---|
| Water inlet valve replacement | $325 – $545 |
| Freezer ice maker assembly replacement | $475 – $850 |
| Ice maker cleaning & descaling (UC-15I) | $249 – $389 |
| Standalone ice maker repair (pump, valve, sensors) | $395 – $895 |
Typical totals for parts and labor in the Las Vegas area. The $75 service call is credited toward your repair, and every repair is backed by a 1-year parts and 180-day labor warranty. Your exact price depends on the model, the part and access, and you approve a firm quote before any work begins. Full price list →
Still Not Working? We Can Help Today.
$75 service call, credited toward your repair · 1-year parts · 180-day labor warranty · EPA 608 certified · Mon–Fri 8am–7pm · Sat–Sun 8am–4pm