The short answer
A Caf QT ice maker fails in a pattern: water arrives or it does not, and the mould harvests or it does not. The matrix below lists four model tags that differ only in their trailing revision characters, so a part that suits one usually suits its neighbours, and the tag still decides. Settling which half is broken takes one look into the mould and costs nothing, and it is the step the brand-generic article cannot put in the right order for a specific platform.
What you can observe on these models
- Cubes have fused into a single block in the bin — Slow production plus repeated part-thaws welds the bin together. It is usually a symptom of a warm freezer, not of the ice maker.
- The ice maker runs but the dispenser delivers nothing — That splits the fault into the delivery chute and auger rather than the maker itself.
- A frost plug at the end of the fill tube — The visible signature of a fill that overshot or a tube that lost its alignment; the next fill freezes on top of the last.
- NEAR MISS — no ice and no cooling either — If the freezer is not holding temperature, the ice maker is a symptom. Work the cooling page first; the ice returns when the cold does.
Causes, most likely first on this family
- Water supply restricted — shutoff, filter or line pressure — Ranked first because it accounts for most of the calls on these models and because every part of it is checkable without tools: the valve behind the unit, the cartridge date and the dispenser flow.
- Fill tube frozen or misaligned — Second because it is visible from the bin opening and is cleared with warm air rather than with parts.
- Freezer temperature too warm to trigger harvest — Third: the module waits for the mould to reach its release point, so a freezer sitting above the safe range makes cycles longer and eventually stops them.
- Water inlet valve solenoid or screen — Fourth, and a real part replacement rather than an adjustment, which is why it sits below the free checks.
- Ice maker module, thermostat or ejector — Last: the module is the part most often replaced and least often at fault. Reaching it before the water side is the classic wasted repair.
Check in this order, and why
- Look into the mould before anything else — Dry means a water-side fault; full and frozen means a harvest fault. Nothing else in this list splits the tree so cleanly.
- Check the bail arm and the on-off control — On these models a raised arm stops production entirely and a shifted bin is enough to raise it.
- Run the dispenser and watch the water flow — A thin or slow stream is the filter or the supply, and it explains hollow cubes without any further work.
Before you open anything
Safety
Unplug before touching the module or its harness — a capacitor can hold a charge after the power is off. A freezer holds food safely at 0 °F (−18 °C) or below; if this job is going to take a while, move the frozen contents out first rather than working with the door propped. Keep water away from the dispenser electrics when clearing a chute.
Models in the QT family
Reference| Model number | Family key |
|---|---|
| QT23C_5I_W | caf:refrigerator:qt |
| QT23QC_5I_W | caf:refrigerator:qt |
| QT28_5I_T1 | caf:refrigerator:qt |
| QT29C_5I_T | caf:refrigerator:qt |
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.
