Start here
Short version: most of these leaks are defrost water that lost its route out. Start with door seal letting humid air in, producing condensation. If the water is clean, cold and keeps arriving with the appliance switched off, close the shutoff and treat it as a supply fault instead.
The symptoms, and the ones that mean something else
- Water pooling under the crisper drawers — The classic blocked-defrost-drain signature: water that should have run to the pan backs up into the lowest point of the fresh-food compartment.
- A steady trickle at the back of the cabinet — Supply-side water arrives continuously and does not stop when the unit stops, which is the fastest way to tell it apart.
- The drain pan under the cabinet is overflowing — A pan that has cracked, or a cabinet tilted forward so the pan cannot hold what it collects.
- NEAR MISS — the water is warm, or soapy — Warm or soapy water came from somewhere else in the kitchen. Dry the floor, put paper down, and confirm the source before opening anything.
Causes, most likely first on a KNDKO refrigerator
- Door seal letting humid air in, producing condensation — Condensation-driven water is usually accompanied by heavy frost somewhere and by a cabinet that works harder than it should, so the evidence is rarely water alone. Number one here, because this is what the cabinet meets first and what owners notice last. This class is light, portable and thinly insulated, and every one of those facts pushes the environmental causes to the top of the order.
- Water backing up because the drain has closed — The blockage is usually at the very top of the tube, where a small plug of ice re-forms after each defrost, so clearing it is often a matter of warm water and patience rather than of dismantling anything. Second, because it produces the same complaint from the other side and is still an owner-side check.
- Cabinet tilted forward so the pan spills — It is also the one component in this system that is routinely disturbed: it comes out for cleaning, and a pan refitted a few millimetres proud spills every time the compressor warms it. It ranks here because it is genuinely less common, not because it matters less when it happens.
- A compression fitting or filter head weeping — Anything plumbed for ice or chilled water brings mains pressure to the back of the cabinet, and a fitting there is under that pressure permanently rather than only when the appliance runs. Last, and the reason the order matters: it is the least likely of the four, and the three above are quicker to settle.
The order that finds it fastest
- Shut the door on a sheet of paper at several points and pull — Paper that slides out easily marks the leak path, and the wet patch inside usually lines up with it. First, and it costs nothing but a minute of attention.
- Check under the crisper drawers for standing water — Water at the lowest point of the fresh-food compartment with a dry floor behind the cabinet means the drain, not the supply. Next, because it takes the same few minutes and covers the other likely half.
- Remove the base grille and look at the pan while the unit runs — A pan sitting proud of its clips, or one with a visible crack, settles the question on the spot. Third, and the last thing worth doing before the phone comes out.
The checks you can make yourself
- Check the door closes squarely and is not held open by the load — A door standing proud by a few millimetres produces exactly this water.
About 15 min
- Empty the freezer floor and pour warm water slowly into the drain opening — Repeat until it runs freely; never push anything metal or sharp down the tube.
Tools: warm water, turkey baster or funnel, towelsAbout 40 min
- Adjust the levelling feet so the cabinet sits firm with a slight backward tilt — It helps the doors close on their own as well as keeping the pan level.
Tools: adjustable spanner, spirit levelAbout 25 min
- STOP as soon as the fault is narrowed to a part rather than a condition — Naming the part is the useful outcome of an owner check. Fitting it is the other half, and it is not the same job.
Before you touch anything
Safety
Before any panel comes off, unplug the appliance or switch off its breaker, and remember that a capacitor can hold a charge after the power is off. Wipe up spilled water before you start: standing water and a cabinet you are reaching into are a bad combination in a kitchen.
When to stop and call
Stop and call at the point where the fix means dismantling the evaporator cover or opening a plumbing joint. Before that, the flush, the pan and the gasket account for most of these calls and cost nothing but an afternoon.
Nearest pages of this class
Scope, and what is missing from it
This is the general page for the class rather than the page for your model. Where a family- or model-specific KNDKO page exists, it is linked here and it is the one to read first. Absent by design: part numbers, torque figures, wiring detail and anything else that differs between families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
