The short answer
The usual source is melt water that could not get to the drain pan, and the usual cause is a blocked drain line. Clearing a drain is really homeowner work and needs nothing more than warm water and patience. On this kind of cabinet a survivor of this vintage has typically already had one repair, and the previous repair is part of the diagnosis.
Symptoms worth separating
- The drain pan at the back is dry while the floor is wet — Conclusive: water is leaving the unit before it reaches the pan.
- A smell of damp or mould near the base — Standing water somewhere it cannot evaporate, typically under a drawer or beneath the liner.
- NEAR MISS — water on the outside of the door only — That is condensation at a failed seal, and the door-seal page covers it.
- Water shows up only after a warm day or a big shop — Heavier defrost load overwhelms a partly blocked drain, so the leak comes and goes.
What is usually behind it
- Defrost drain blocked with debris or frozen shut — Ranked first: This is the leak on almost every cabinet: the drain hole is small, it sits at the coldest point, and it collects everything that falls into it. It sits at the top here since a survivor of this vintage has typically already had one repair, and the previous repair is part of the diagnosis.
- Door seal leaking and condensing air inside the unit — Second: If the paper test fails at any point on the door, the seal is part of this leak whatever else is found.
- Drain pan cracked, displaced or overflowing — Third: Pans on price-built cabinets are thin and crack when the unit is dragged; the crack is rarely visible from the front.
Order of investigation
- Run the paper test round the door — A leaking seal loads the drain with condensation that it was never meant to handle.
- Check the drain pan at the back of the unit — A dry pan with a wet floor proves the water never got there; a brimming pan says something else is wrong.
- Note whether the fault follows the weather — Faults that appear in warm humid conditions and disappear in cool ones point at sealing and airflow rather than electronics.
Safe checks, step by step
- Chip nothing: melt the ice sheet under the drawers — Empty the compartment and let the ice melt naturally, or use warm cloths. Prising it out cracks the liner.
Tools: warm cloths, towelsAbout 30 min
- Check and dry behind the unit after a full day — A dry drain and a wet rear wall means the supply fitting is weeping, which is a different repair.
Tools: torch, paper towelAbout 15 min
- Clear the drain with warm water and a soft flexible tube — Pour slowly and let the warmth do the work. Never use a metal wire or a sharp tool — a punctured trough turns a free fix into a repair.
Tools: warm water, turkey baster or soft tubingAbout 25 min
- STOP HERE if the next step needs a meter on live terminals — That is where the homeowner sequence ends and a technician begins, and the boundary exists for good reasons.
Power, water and hands
Safety
Before a screwdriver touches a cover, unplug the unit or switch off its breaker — a charged capacitor does not care that the display is dark. The sealed refrigeration circuit is not homeowner-serviceable — refrigerant is under pressure, the tubing is thin, and opening it is licensed work. Nothing in the sealed circuit is an homeowner job: it is pressurised, and the law treats venting it as a violation in its own right.
When this stops being DIY
If the drain reblocks within days of being flushed, stop flushing — repeated blockage means debris beyond reach or a drain heater that has stopped working. Call when you have run out of checks that cost nothing, which is typically the honest end of an homeowner sequence.
Related pages of the same kind
Generalized information
What follows the brand on your rating plate matters more than the brand itself, and this page cannot see it. Where a family- or model-specific page exists for your cabinet, it is the more specific answer and it is linked from the pages listed here — start there if your model shows up by name. Part numbers, harness colours and service-mode entry codes are not published here for exactly that reason. It also leaves out anything specific to a rebuilt or previously repaired unit, where the last repair is part of the picture.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
