Sub-Zero Symptom Guide

Sub-Zero Ice Maker Making Small or Hollow Cubes

Small, hollow, or misshapen ice cubes point to low water pressure or flow reaching the ice mold, rather than a failure of the icemaker itself.

Sub-Zero Ice Maker Making Small or Hollow Cubes — Technician inspecting an ice maker module and water line connection Ice Maker & Water Dispenser
Likely Causes

What’s usually behind it.

Ice and water symptoms usually trace back to the water supply, the fill valve, or the icemaker module — components separate from the refrigeration system, which is why ice problems often show up even when cooling is working fine.

What You Can Check Yourself

Before you call.

When to Call a Professional

Beyond checking the supply line and shutoff valve yourself, confirming a valve, module, or flow issue means testing components behind panels.

$99Diagnostic, Waived w/ Repair
Up to 365Days Warranty
Same-DayAppointments
Related Symptoms

Other Ice Maker & Water Dispenser symptoms.

FAQ

Sub-Zero Ice Maker Making Small or Hollow Cubes, answered.

What does “Sub-Zero Ice Maker Making Small or Hollow Cubes” usually mean?

Small, hollow, or misshapen ice cubes point to low water pressure or flow reaching the ice mold, rather than a failure of the icemaker itself. The most common cause is low water pressure at the supply line.

Can I fix this myself?

Checking the water supply line and shutoff valve is safe and often resolves simple cases — beyond that, it’s worth having a technician confirm before ordering parts.

Is it safe to keep using the water dispenser with this issue?

If water is actively leaking, turn off the supply line at the shutoff valve until it’s inspected to avoid water damage.

Does this affect the refrigerator's cooling performance?

No — the ice maker and water system are separate from the main cooling system, so this typically doesn’t affect food safety.

How long does an ice maker or water valve repair typically take?

Once diagnosed, most are same-visit repairs.

Could it just be the water filter?

It’s worth checking first, since an old filter is one of the most common and easiest-to-fix causes of reduced ice or water flow.

Ready when you are.

Same-day and next-day appointments across Newport Beach and Orange County.

Call (949) 848-3329
Call (949) 848-3329