The short answer for these models
A warm cabinet with a working compressor is a delivery problem. The cold is being made and then lost — through a frosted evaporator, through a seal that has gone hard, or into a condenser that has no air to give its heat to. Two of those cost nothing to check and the third costs a vacuum cleaner. On the KS refrigerators the brand-level answer holds and the order does not: a glazed door leaks far more heat than a solid one by design, so the same fault reads as more severe on a glass-door unit and the baseline you are judging against has to change with it, so the door and glazing checks come before the rest on these models.
How this shows up
- Before the list: which of the KS forms is in front of you — Look at the door itself. Glass sheds far more heat than a solid panel, so longer running, some sweating and a warmer shelf by the door are the baseline rather than the fault.
- Frost has built into a sheet rather than a dusting — Frost thick enough to hold a fingerprint has stopped being condensation and started being the obstruction.
- The compressor runs and never cycles off — There is no quiet period between cycles at any hour, which means the control has never been satisfied.
Causes, most likely first on this family
- The thermostat, the sensor or the control — A control that thinks the cabinet is already cold stops asking for more, and a sensor sitting in the wrong airstream reports a temperature nobody has. The ranking moves here for a reason particular to these models: how the unit is built changes what this finding means. That is what puts the door and glazing checks ahead of everything else on the list.
- The sealed system or the compressor — It comes last because every cheap cause above has to be excluded before anyone opens a refrigerant circuit, which is licensed work.
What to check first, and why that order
- First — shut the door on a strip of paper and pull — Do it at several points around the frame. Anywhere the paper slides out without resistance is a leak, and it takes a minute to find. On these models this is the step the construction changes: the answer only tells you something once you know which form the unit is.
- Second — look at the cold source for frost — Get the shelves out of the way and look at the cold surface itself. What you are judging is thickness, and thickness is obvious once you can see it.
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. Defrost with time and open doors, never with a blade or a heat gun, because the evaporator tubing sits directly behind the ice. A refrigerator holds food safely at 40 °F (4 °C) or below, so move anything perishable to a cooler while you work rather than gambling on it.
Where the owner job ends
Book the visit when the door, the frost and the condenser have all come back clean, because at that point the remaining candidates are a control or the sealed system. Move the food first and say on the phone whether the compressor runs continuously — that one answer tells the technician which half of the machine to bring parts for.
The other symptoms 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.
