The short answer
When the Caf QT family stops cooling, start from which compartment went warm first, because on this platform that single observation splits the likely causes in half. 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. A freezer that is still hard-frozen with a warm fresh-food section is an airflow or damper fault; both compartments warm together points at defrost, the condenser, or the sealed system.
What you can observe on these models
- The freezer is still hard-frozen while the fresh-food side is warm — Cold is being made; it is not reaching the upper cabinet. Look at the air path, not the compressor.
- A solid sheet of frost across the freezer rear panel — Normal frost is a light dusting that comes and goes. A sheet means a defrost cycle that is no longer clearing it.
- The vents blow air that is barely cool — Airflow exists but has crossed an iced coil, so it arrives without having picked up much cold.
- NEAR MISS — the unit is silent and nothing is cold — No hum at all is a power, start-relay or control fault, not a cooling fault. That belongs on the no-power page, not this one.
Causes, most likely first on this family
- Condenser coil fouled or condenser fan not turning — Ranked first because it is the most reversible of the causes and the one most often found on units that sit close to a wall or on carpet.
- Defrost circuit no longer clearing the evaporator — Second: the classic slow-onset fault, confirmed by the fact that an overnight unplug restores cooling for a day or two.
- Evaporator fan motor stopped — Third, and the quickest of the internal checks once the frost question is settled.
- Overloaded cabinet or blocked interior vents — Fourth: packing boxes against the rear vents starves the fresh-food section in exactly the way a failed part would.
Check in this order, and why
- Unplug overnight, then run it and time the recovery — If cooling comes back for a day or two and then fades, the defrost circuit is the cause and nothing else on the list behaves that way.
- Vacuum the condenser and confirm the condenser fan spins — Do this while the unit is already unplugged; it costs one pass with a brush and removes a whole branch of the tree.
- Listen for the evaporator fan on restart — A fan that starts and then falls silent as the cabinet cools is a blade fouling on ice, not a dead motor.
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. The freezer rear panel on the Caf QT family sits directly over the evaporator fan blade and the defrost heater, so take it off with the power gone and give the coil time to thaw rather than chipping at it: a screwdriver through an aluminium coil turns an airflow fault into a sealed-system replacement. Leave the door switch wired as it is; it cuts the fan for a reason.
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
The owner line on the Caf QT family ends where the panel screws do: vacuuming the condenser, clearing the vents, checking the seal and listening for the fan are all yours. Call once the air path is proven clear and the cabinet is still warm, because what remains is the defrost circuit under load, the sensor set or the sealed system. Call immediately — before running it again — if you smell burning, see oil around the compressor, or the breaker trips when the compressor starts.
Other faults covered for this family
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