The short answer
On the QX refrigerators an ice complaint is usually a water-supply or a temperature problem rather than a failed ice maker, and the two are easy to tell apart once you know what to look at. Most of this is owner-checkable in a few minutes.
What you observe
- The mould is empty and dry — Nothing has arrived. That points hard at the supply side — the valve, the line, the filter or a shut-off nobody remembers closing.
- The mould is full of water that never freezes — Water is arriving and the compartment is not cold enough to harvest. That is a temperature fault wearing an ice maker costume.
- Cubes are small, hollow or cloudy — A partial fill, usually restriction rather than failure: a clogged filter, a kinked line or a valve that is opening but not fully.
- Cubes fuse into one block in the bin — Slow harvest or repeated part-melting. It means the compartment is drifting warm between cycles even if it feels cold to a hand.
- NEAR MISS — water pools under the unit instead — That is a supply-line or drain leak and it is covered on its own page. Chasing it here wastes an afternoon.
Causes, most likely first on the QX models
- The freezer section simply is not cold enough to harvest — Ranked first on a static-plate cabinet: without forced air the compartment leans on the plate alone, so anything loading the plate — a door seal, a warm room, a packed shelf — shows up as no ice before it shows up as anything else.
- The supply is restricted or the filter is overdue — Second: the symptom is small hollow cubes rather than none, and it is the cheapest cause to eliminate.
- The fill tube has frozen over — Third, and on this build it is more common than on a fan-forced cabinet because the compartment runs closer to the freezing point in more places.
- The ice maker module has failed — Last: it is the part everyone blames and the part that is least often at fault. Ruling out the three above first is what keeps you from buying one you did not need.
Check in this order, and why
- Measure the compartment temperature before anything else — First on a static-plate cabinet, because if the section cannot get cold enough there is no point testing anything downstream of it.
- Look in the mould — Second: dry means supply, full of water confirms the temperature reading you just took, partly filled means restriction.
- Check the filter and the supply shut-off — Third, and the cheapest correction available if the mould told you restriction.
- Inspect the fill tube and the shut-off arm — Last, because on this build a frozen tube is a symptom of the temperature problem you started with and fixing it alone will not hold.
Before you open anything
Safety
Unplug the refrigerator or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. Turn the water supply off at the shut-off before disconnecting any line, and never thaw a fill tube with an open flame or a heat gun: the tube and the mould are plastic and the components around them are not rated for it.
When to call a technician
Call once the mould, the filter, the supply and the arm are all clean and there is still no ice. On the QX models the line is the fill valve: everything upstream of it is owner work, and testing a valve means a meter across a live solenoid, which is not. Call sooner if the compartment cannot reach and hold a safe freezing temperature — that is a cooling fault, it is costing you more than ice, and it is covered on its own page.
