The short answer
On the Caf CSB family an ice maker that has stopped is usually a water-side fault rather than a failed module: a closed shutoff, a clogged filter, a frozen fill tube or a valve that no longer opens. Four model tags make up this family in the matrix below: close enough that the checks are common to all of them, far enough apart that parts are ordered by tag. A freezer holds food safely at 0 °F (−18 °C) or below, and the harvest cycle needs that same cold — a freezer running warm will leave a perfectly healthy ice maker idle.
What you can observe on these models
- Water pools under the bin and refreezes — Overfill or a misaligned fill tube. It ends as a sheet of ice under the bin and a jammed auger.
- The bin is empty and the mould is dry — No water is arriving. Everything upstream — arm position, shutoff, filter, fill tube, valve — comes before any thought of the module.
- Cubes are small, hollow or crescent-shaped — Water is arriving but not enough of it. That is flow: a restricted filter, a partly closed shutoff or low supply pressure.
- NEAR MISS — water leaking from the dispenser front — That is a water-leak fault rather than a production fault, and it belongs on the leak page.
Causes, most likely first on this family
- Bail arm raised or the ice maker switched off — Ranked first: it is the single most common reason a healthy ice maker makes nothing at all.
- Filter past its life or an aftermarket cartridge that does not seat — Second: flow drops gradually with a tired cartridge and instantly with one that does not match the head, and both show as hollow cubes first.
- Frozen fill tube or an overfilled mould — Third because it is the failure that looks like a dead module from the front of the cabinet.
- Freezer running warmer than the harvest point — Fourth: check the freezer against 0 °F (−18 °C) before blaming the ice maker; slow cycles are the first sign of a cabinet losing its grip.
- Inlet valve or module failure — Last — a valve or module is a legitimate failure, just not the first one to assume.
Check in this order, and why
- Empty the bin completely and look underneath — A sheet of ice under the bin jams the auger and stops delivery while production continues normally.
- Confirm water reaches the mould on a forced fill — Water arriving and then sitting unfrozen moves the whole fault to temperature rather than supply.
- Check the fill tube alignment — A tube nudged out of line overfills the mould edge and builds the plug that stops the next cycle.
- Compare cube size over a full day — Hollow cubes that stay hollow confirm restricted flow; normal cubes that stop confirm the harvest side.
Before you open anything
Safety
Unplug the refrigerator or switch off its breaker before reaching behind the ice maker or removing a panel — a capacitor can hold a charge after the power is off. Do not chip a frozen fill tube or a bin sheet with a screwdriver: the tube deforms and the evaporator tubing behind it punctures easily. Warm air at a distance is the only safe way to clear ice on the Caf CSB family.
Models in the CSB family
Reference| Model number | Family key |
|---|---|
| CSB42WP*N*** | caf:refrigerator:csb |
| CSB42YP*N*** | caf:refrigerator:csb |
| CSB48WP*N*** | caf:refrigerator:csb |
| CSB48YP*N*** | caf:refrigerator:csb |
When to call a technician
Clearing ice, reseating a bin, changing a cartridge and opening a shutoff are yours. Call once a part has to be condemned — valve, module, thermostat or auger motor — because each of those needs the tag from the interior label and a test rather than a guess. Call urgently if you find water pooled under the cabinet rather than inside it.
Other faults 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.
