The answer first
On an upright freezer with an ice maker, a bin that stays empty is almost always a water, temperature or switch problem — and the mechanism itself is the last thing to suspect rather than the first. On a Criterion a water filter that is long overdue comes first, because a value-tier build puts the cheap wearing parts — filters, hoses, seals, screens — in the path of everything the machine does, so they are where the fault usually is. The shut-off arm, the supply valve, the filter and the cabinet temperature are owner work; the module, heater and fill valve are not.
The observables
- Cubes are small, hollow or fused together — A partial fill, usually flow restriction or a fill tube starting to freeze.
- The mould is full of ice that never ejects — The harvest is failing rather than the fill.
- Ice has welded into a single block in the bin — Slow use plus temperature swings, often behind a marginal seal.
- NEAR MISS — Ice tastes of the freezer — That is a storage and filter issue, not a production fault.
Causes, most likely first
- A water filter that is long overdue — Most likely here: a value-tier build puts the cheap wearing parts — filters, hoses, seals, screens — in the path of everything the machine does, so they are where the fault usually is. A blocked filter restricts the fill so the mould is only partly filled, which shows as small or hollow cubes before it shows as none.
- A closed or crushed water line behind the cabinet — Second on the list: A standalone freezer is pushed against a wall, and its supply line is the thing that gets crushed when it goes back.
- A cabinet not cold enough to trigger the harvest — Third on the list, and the least likely: The harvest cycle starts when the mould reaches a set temperature; a freezer running warm never reaches it and simply stops making ice. A store-brand unit is usually carried home and set up by the owner rather than by a delivery crew, and setup errors survive for years.
What to check first, second, third
- Check the filter age and how quickly water runs where there is a dispenser — Slow flow with an open valve is the filter until proven otherwise. Start here: on this platform it is both the most likely finding and the quickest to confirm.
- Pull the cabinet out and follow the line to its valve — A crushed line or a valve closed during other work is a very common finding.
- Put a thermometer in the cabinet overnight rather than reading the dial — A cabinet warmer than it should be explains an idle ice maker with nothing wrong in the module.
The checks you can do yourself
- Change the filter and flush the recommended volume through afterwards — Flushing clears carbon fines and air, which otherwise make the first cubes cloudy.
About 20 min
- Open the valve fully and re-route the line with a gentle loop of slack — Enough slack that the cabinet can be moved without straining the joint.
About 20 min
- Stop here if the next move needs a meter on live terminals — That is where an owner check ends and a service call begins.
Read this before you start
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Refrigerant is licensed work: oil or a hiss at the compressor means stop and call, and two people move a cabinet this size.
Where an owner fix ends
Call when the arm is down, the valve is open, the filter is fresh and the cabinet is properly cold, and the mould is still not cycling — the module and the fill valve are inside the cabinet. One line to keep in mind while you wait: A freezer holds food safely at 0 °F (−18 °C) or below.
Nearest pages of this class
How specific this page is
Everything above is generalized across the Criterion freezer range rather than tied to a model. No family- or model-specific page exists beneath it yet; when one is published it will be linked here and it will outrank this page for a named model. Deliberately not here: wiring colours, resistance values, torque figures and part numbers, which differ between families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
