The short answer
Ice faults are nearly always water faults. Work from the shut-off valve forward: supply, filter, fill tube, then the mould, and leave the module until last. Freezer temperature is the other half - a freezer that is not cold enough will not release cubes properly.
What you actually see and hear
- The mould is dry and nothing has been made at all — No water arriving. Valve, supply or filter.
- A block of ice in the mould rather than separate cubes — Overfilling or a slow fill, which usually means a partly blocked supply.
- A small frozen plug at the fill tube where water enters — The classic: one slow fill froze and now blocks every fill that follows.
- Hollow or small cubes — Low water pressure, a restricted filter or a freezer that is not cold enough.
- NEAR MISS - plenty of ice but it tastes stale — Storage and filter life, not a production fault.
Causes, most likely first on this machine
- Water supply valve closed or a kinked line — First, and the most common by a distance. A valve knocked shut when the cabinet was moved, or a line crushed against a wall, stops ice completely with nothing broken.
- A clogged or overdue water filter — Second. It reduces flow gradually, so cubes get smaller and hollow before they stop.
- A frozen fill tube — Third, and self-perpetuating: once a plug forms, every subsequent fill freezes on top of it.
- Freezer temperature too warm — Fourth. A freezer holds food safely at zero degrees Fahrenheit or below, and an ice maker needs comparable cold to complete its cycle and release.
- The feeler arm or ice level control — Fifth, and free to check. An arm lifted by a bag of frozen peas stops production by design.
- Ice maker module or inlet valve — Last. Both fail, but they are what remains after the five above.
Check in this order, and why
- Check the feeler arm is down and the ice maker is switched on — Free, instant, and a surprisingly frequent answer.
- Trace the water line to its shut-off valve — Look for a valve turned off and a line crushed behind the cabinet.
- Check the filter age — Flow through an overdue filter is the classic cause of small hollow cubes.
- Put a thermometer in the freezer — A warm freezer explains poor ice without anything being faulty.
- Look at the fill tube for a frozen plug — If it is there, the fill has been slow for a while and the cause is upstream.
What an owner can safely check
- Confirm the ice maker is switched on and the arm is down — Check nothing in the bin is holding the arm up.
About 5 min
- Follow the water line back and open the shut-off valve fully — Look for kinks where the cabinet was pushed back.
Tools: torchAbout 15 min
- Replace the water filter if it is overdue — Restores flow and cube size together.
Tools: replacement filterAbout 15 min
- Put a thermometer in the freezer overnight — Zero degrees Fahrenheit or below is what the ice maker needs to work with.
Tools: thermometerAbout 15 min
- Empty the ice bin and let one full cycle run — A jammed bin stops production in a way that mimics a failure.
About 240 min
- STOP HERE before thawing the fill tube with heat or removing the module — A heat gun near a plastic freezer liner does real damage, and module work is live work.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel - a capacitor can hold a charge after the power is off. The defrost heater and the compressor circuit are both live behind the rear and lower panels, and a capacitor can hold a charge after the power is off. Never use a heat gun or a naked flame to clear frost from an evaporator, and never chip at frost with anything metal near the tubing.
When to call a technician
Call when water is demonstrably reaching the cabinet, the filter is fresh, the freezer is cold and the mould still stays dry - that leaves the inlet valve or the module. Call a plumber instead if the shut-off valve is seized or the supply line is damaged behind the cabinet. Do not replace an ice maker before the water path is proved: a new module fed no water makes exactly as much ice as the old one did.
Nearest pages of this class
What this page does not cover
This page is written for the full-size frost-free refrigerator class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: fan and defrost part numbers, thermistor resistance values, refrigerant charge and shelf dimensions, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
