Start here
The short answer: most refrigerator leaks are defrost water that has lost its route to the drain pan, not a burst pipe. Start with ice building up around the fill tube and melting on this cabinet. The supply side is real but less common, and it is the one that can flood a kitchen.
What you observe
- 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.
- Water in the ice bin or under the icemaker — An overfill or a mis-aimed fill tube, which is a supply fault reaching the freezer.
- Damp at the door edges or sweating on the outside of the cabinet — Condensation rather than a leak — the cabinet is meeting humid room air somewhere it should not.
- 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.
The ranking, and why it is this way round
- Ice building up around the fill tube and melting — It belongs on the list because the evidence is inside the freezer and easy to see once you know to look there, and because the remedy starts with switching the icemaker off. Number one here, because this is what the cabinet meets first and what owners notice last. On a badge this size the parts channel is thin, so the ranking is written around what can be checked and corrected without a part on 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. It follows the first because the two produce the same complaint, and this one is the cheaper of the pair to eliminate.
- A compression fitting or filter head weeping — This cause is the one with real consequences for the room rather than for the appliance, which is why it is worth identifying early even though it is less common than a blocked drain. This far down the list because it needs the two above ruled out before the evidence for it means anything.
- Warm humid air meeting cold surfaces inside — It ranks here because it is free to test with a sheet of paper and because it also explains the other complaints the same cabinet may be producing: more frost, longer run times and warmer food in the door. Last, and deliberately so — it should be where a diagnosis ends rather than where it starts.
Check in this order, and why
- Look behind and above the icemaker for a build-up of ice — Ice anywhere other than in the mould or the bin means water is going where it should not. First, because it separates the top two causes in under a minute.
- 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. Then this — it is the next cheapest thing that can be wrong.
- Check whether the water keeps arriving when the unit is switched off — Water that arrives regardless of the cycle is mains water, and the shutoff is the immediate answer. Third: by now the answer is usually already in hand.
What to do, step by step
- Clear ice from the bin and around the mould, then restart and watch one fill — One observed cycle tells you whether the fill is landing correctly.
About 20 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
- Close the water shutoff to the cabinet and see whether the leak stops — This is both the diagnosis and the first aid: it protects the floor while you arrange the rest.
About 15 min
- STOP before testing anything electrical with the power on — The checks above are all done cold. A test that needs power applied is a technician test, whatever a video shows.
Read this before you start
Safety
Unplug the appliance or switch off its breaker before removing any panel. If you smell burning, stop there and call — do not keep running it to see whether the smell returns. Work with dry hands on a dry floor, and never chip at frost with a tool that can puncture tubing.
When to hand it over
Book the visit once the pan is seated, the gasket seals and the drain runs freely and water still appears. Note where it appears first — that is the single most useful thing you can hand a technician.
Nearest pages of this class
Scope, and what is missing from it
What you are reading is written for the class, not for one KTN model. A family- or model-specific page, where one exists, carries what this page cannot: the exact part numbers, the board layout and the disassembly order for that line. Go there first if your model is named.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
