The short answer
On a countertop machine, stop the water before you find it - the worktop puts it near sockets and into drawers. Overfilling the tank, a hose that has slipped, and the door seal cover nearly every case.
What you actually see and hear
- Water at the fill opening or down the back of the machine — Over-filling the tank. The commonest cause on this class.
- Water at the front during the wash — The door seal, or something in the rack holding the door fractionally open.
- Water in the sink area or down the units during drain — The drain hose has slipped out of the sink.
- A puddle under the machine after the cycle — Could be any of the above - it collects where the worktop falls.
- NEAR MISS - condensation running off the door when you open it — Normal at the end of a hot cycle.
Causes, most likely first on this machine
- Over-filling the tank — First, and specific to tank-fill machines. Poured past the mark, the excess finds its way out during the cycle.
- Drain hose slipping out of the sink — Second. It is light, it is short, and it moves when the machine vibrates.
- Door seal or a loaded rack holding the door ajar — Third. A single item proud of the rack is enough on a small door.
- Detergent overdose — Fourth. A small tub fills with foam quickly, and foam climbs past a sound seal.
- Tank, tub or internal hose fault — Last, and it is the point at which a countertop machine is usually replaced rather than repaired.
Check in this order, and why
- Watch a cycle with the machine on a tray and paper around it — Containment and attribution in one step.
- Check the tank fill level against its mark — Over-filling is the first suspect on this class.
- Check the drain hose is secured in the sink — It slips more often than owners realise.
- Look round the door seal for grit and for items holding the door open — Small doors are unforgiving of a proud item.
What an owner can safely check
- Stand the machine on a shallow tray and put paper around it — Do this first - the worktop is near sockets and drawers.
Tools: shallow tray, kitchen paperAbout 10 min
- Fill the tank only to its marked level — Under-filling washes badly; over-filling leaks. The mark is there for both reasons.
Tools: jugAbout 5 min
- Secure the drain hose so it cannot leave the sink — A clip or a weight is enough.
About 10 min
- Clean the door seal and check nothing in the rack is proud of it — One tall item can hold a small door open.
Tools: clothAbout 10 min
- Use the correct dose of dishwasher detergent for one cycle — If the leak stops, it was foam and nothing was faulty.
About 90 min
- STOP HERE if water comes from underneath the machine with the tank correctly filled — That is the tub or an internal hose.
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. A countertop dishwasher puts a live appliance and an open water tank on the same worktop, so keep the plug and the socket away from the fill opening and wipe spills immediately. Let a hot cycle cool before reaching into the tub, and never carry the machine with water still in the tank.
When to call a technician
Contact the supplier if water appears from underneath the machine with a correct fill, a secure hose, a clean seal and a sensible detergent dose. Stop using it on the worktop until then, because water near a socket is the real risk on this page rather than the appliance itself. On a machine of this price a tub or internal hose fault is usually a replacement decision, and the supplier is the right first call rather than an independent technician.
Nearest pages of this class
What this page does not cover
This page is written for the countertop dishwasher class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: spray arm and pump part numbers, tank capacity figures, hose specifications and control diagnostics, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
