The short answer
On KS models the honest first suspicion for a warm cabinet is the control setting and the door, then the condenser, and only then anything inside the sealed system. That is a different order from the brand-generic page, and the reason is the build: there is no separate evaporator compartment to ice over the way a full-size freezer does.
What you observe
- It runs for a short spell, stops, and starts again quickly — Short cycling is a different pattern from continuous running and points at the start components or at overheating rather than at airflow.
- The cabinet is warm while the unit is clearly running — You can hear or feel the compressor working, but the air inside never gets cold.
- The unit never stops running — A cabinet that cannot reach its setting runs without a break.
- One compartment is cold and the other is not — On models with a separate freezer section, cold in one and warm in the other points at airflow between them rather than at the compressor.
Causes, most likely first
- A condenser coil or grille blanketed in dust — Ranked first on this family. The condenser is small, it is close to the floor or the wall, and the clearance around it is measured in fingers.
- A door seal that no longer grips along its whole length — Second, and the cause owners most often miss. A compact cabinet loses its whole reserve to a small leak, and the seal on a light door takes a set if the unit has been transported or stored shut.
- Start relay or overload protector — A compressor that will not start, or that starts and drops out again after a few seconds, is usually its start components rather than the compressor itself. The tell is the short repeated cycle rather than continuous running.
- A failed evaporator or condenser fan — On models that use a fan rather than free convection, a fan that has stopped gives exactly the warm cabinet of a blocked coil, with no dust to show for it. Listen for it before opening anything.
Check in this order
- Put a separate thermometer in the cabinet and read it after some hours — It separates a cabinet that is genuinely warm from one whose control display is wrong, and it costs nothing.
- Look at the condenser grille and the space behind the cabinet — Dust here is the first-ranked cause on this family, and the check needs a torch and nothing else.
- Check where the control is set and whether it has been knocked — A knocked dial is the one cause that looks exactly like a failed platform and costs nothing at all.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Do not attempt anything on the sealed system: the refrigerant circuit on this family is brazed closed, it carries no service ports an owner can use, and opening it is licensed work.
Models in the KS family — The models this page covers, as the product spine lists them. The table resolves to more than one model stem, so confirm yours in it before assuming a neighbour fix applies.
Reference| Model number | Family key |
|---|---|
| KS-123R | black-decker:refrigerator:ks |
| KS-35F | black-decker:refrigerator:ks |
| KS-48R | black-decker:refrigerator:ks |
| KS-71R1 | black-decker:refrigerator:ks |
| KS-91R | black-decker:refrigerator:ks |
When to call
Call once the door, the clearance and the condenser are all clean and the cabinet still will not hold temperature. That is the point at which the remaining causes are inside the machine.
Other faults on 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.
