The short answer
On Blomberg K refrigerators this symptom narrows faster than it does at brand level, because the construction of this family rules some causes in and others out early. Ice production is a supply chain with four links: water arriving, water freezing, ice harvesting, ice storing. Work out which link broke and the repair is usually obvious. Start at the water side, because that is where most of these faults live and because it is also the cheapest end of the chain to check.
What you observe on these models
- Cubes are clear at the edges and cloudy in the middle — A fill that has been interrupted and completed, freezing in two stages rather than one.
- The mould holds a solid block of ice that never releases — Water arrived and froze; the harvest step is what failed.
- Ice in the bin has fused into one lump — Production is intermittent and the bin is thawing and refreezing between cycles.
- NEAR MISS — water is running down the inside of the cabinet — That is a leak, not an ice fault, and the water-leak page covers it.
Causes, most likely first on this family
- Ice maker module, mould heater or fill valve failed — Last, because it is the part everyone suspects first and the part that is least often at fault — and it is the only entry here that involves live terminals.
- Shut-off arm lifted or the control switch off — Fifth, because a bag or a box in the bin will hold the arm up just as effectively as a deliberate switch-off.
- Freezer not cold enough to trigger a harvest — Fourth on this list because it is a symptom of a different fault rather than a fault of the ice circuit.
- Where the family construction changes the ranking — On this platform the sequence is set by access as much as by likelihood. The result is that the cause you can rule out without tools comes first, and the one that needs a teardown comes last, regardless of how the brand-wide numbers would order them.
Check in this order, and why
- Listen for the fill buzz and then for water arriving — A buzz with no trickle puts the fault between the valve and the mould, which is usually a plug of ice in the last stretch of tube.
- Check whether the mould is dry or holds ice — Dry means the fault is on the water side. Full and frozen solid means the fault is on the harvest side. This one observation halves the list.
- Check the freezer is actually cold — A freezer holds food safely at 0 °F (−18 °C) or below; an ice maker in a warm freezer will not cycle and is not the fault.
- Why this order suits these models — The sequence above is chosen for this family's construction: each step is picked to eliminate as much as possible before anything has to come apart, so the checks that need no panel removed are done first and the ones that do are left until they are the only possibility remaining.
Before you open anything
Safety
Treat the back of the cabinet as live even after the plug is out, because a capacitor holds its charge for a while. Keep the refrigerant tubing untouched — it is sealed for a reason and opening it is neither legal nor recoverable at home.
When to call a technician
Call as soon as the diagnosis points at the sealed system, however early that is. Nothing on that circuit improves with time, and a unit left running with an open system loses the compressor as well as the charge.
Other faults covered for this family
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