The short answer for these models
Before opening anything, find out whether water is reaching the mould. A dry mould and a wet one send you to completely different halves of the problem, and the difference takes ten seconds to establish. On the CCUN refrigerators the brand-level answer holds and the order does not: a single-door cabinet shares one cold source between the chill box and the food space, so a fault in one shows up in the other and the symptom you notice is rarely where the fault is, so the compartment-by-compartment checks come before the rest on these models.
What you actually see
- How your CCUN unit is built — the check that comes before the list — Count the outer doors. One door means one cold source shared between the compartments, so a symptom in either can have its cause in the other.
- No ice at all, and the tray or mould is dry — Nothing is arriving. The fault is on the supply side of the ice maker rather than inside it.
- The ice maker runs but the bin stays empty — Cubes are being made and then not released, which is a harvest or a jam problem.
- Ice tastes or smells of the cabinet — Ice absorbs whatever the air carries. Uncovered food, an old bin and slow turnover all do this.
- NEAR MISS — water is pooling under the cabinet rather than freezing — That is a leak, not an ice fault, and it belongs on the page about water where it should not be.
Causes, most likely first on this family
- The bin, the arm or the switch is out of position — Common, free to correct, and one of the few faults that produces a perfectly healthy machine doing nothing. The ranking moves here for a reason particular to these models: how the unit is built changes what this finding means. That is what puts the compartment-by-compartment checks ahead of everything else on the list.
- The fill valve, the mechanism or its heater — It sits at the bottom of the order deliberately: everything above it is cheaper, more common and checkable without tools.
What to check first, and why that order
- First — look at the mould and the bin — Dry means a supply fault; wet or frozen over means the water is arriving and the problem is later in the chain. On these models this is the step the construction changes: what you found at the step above decides how much weight to give what you find here.
- Second — check the shut-off arm or sensor position — An arm held up by a bag of ice, or a sensor covered in frost, reads as a full bin and stops the cycle.
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. Never put your hand into an ice maker to free a jam while the machine is live; the harvest cycle starts on its own schedule and it does not know your hand is there. Warm water clears frost safely and nothing sharper should be used.
Where the owner job ends
The line is the panel. Anything you can reach with the bin out is yours; anything behind a cover is a visit. Say on the phone whether the mould is wet or dry, because that single fact decides which part the technician brings.
The other symptoms covered for this family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
