The short answer
On the MCD family an ice fault is usually a water-supply or temperature problem rather than a failed ice module, and the split between the two decides everything. That reorders the brand-generic page, which starts at the module itself.
What you observe
- No ice at all and a dry mould — Water is not arriving: supply, valve or a frozen fill tube.
- Mould fills but the ice never releases — A temperature or harvest fault rather than a supply fault.
- Hollow, small or slow-forming cubes — Partial supply restriction, often a part-closed stop tap or a clogged filter.
- Ice tastes or smells wrong — An old filter or long-stored ice absorbing cabinet odours rather than a mechanical fault.
- NEAR MISS - the whole cabinet is warm — Fix the cooling fault first; ice production is the first thing to stop when a cabinet warms.
Causes, most likely first on MCD
- Water supply: stop tap, line or a frozen fill tube — Ranked first on the MCD family: where a module is fitted to this class of unit at all, its supply is a small-bore line that blocks or freezes readily. Every model code in the table above shares the same air path, which is why this ranks above the sealed system rather than below it. What moves against the brand-generic order is lower down: freezer compartment not cold enough sits above ice module, fill valve or the harvest mechanism here, because the family spans several sizes on one platform and it is the shared parts that wear.
- Water filter overdue or restricting — Second: many units in this class have no filter at all, in which case the restriction is in the line itself.
- Freezer compartment not cold enough — Third: a compact cabinet has little cold reserve, so any door opening leaves the module warm for a long time.
- Ice module, fill valve or the harvest mechanism — Fourth: the module is a sealed assembly: it is diagnosed by elimination and replaced rather than repaired, which is why it sits below the supply questions.
- Arm, switch or the ice-off setting — Last: a small control panel makes an accidental off-setting easy.
Check in this order, and why
- Check the arm or the ice-off setting first — It takes seconds and explains a total no-ice with nothing broken.
- Check the bin is fully home and the chute is clear — A bin not seated holds the arm up or blocks the chute and stops production entirely.
- Confirm the stop tap is open and the filter is current — A part-closed tap or an overdue filter gives small hollow cubes rather than none.
- Check the compartment temperature before blaming the module — A freezer holds food safely at 0 °F (−18 °C) or below; above that, no module will keep up.
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. Shut the water supply at the stop tap before touching any fill line, and treat the sealed system as off limits: refrigerant work is licensed work.
When to call a technician
Call once water is proven to reach the mould and the compartment is cold enough but no ice forms: what is left is the module or its harvest circuit, and neither is an owner part here.
Other MCD pages
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