The short answer
Start with the tap adapter rather than the machine: on a Comfee countertop dishwasher it accounts for more of these than anything else, and the door seal or a deflected spray is the next thing to rule out. A countertop dishwasher lives beside the sink and borrows its water and its drain through an adapter on the tap, which puts the two ends of its plumbing in the owner's hands every time it runs. Two of the four are owner work; the last one on the list is not, and knowing which is which saves the call-out.
What you observe
- Water on the floor in front of the machine — The door seal, or something deflecting the spray at it.
- A damp cupboard or a swollen plinth — A slow weep under the sink that has been running for weeks.
- NEAR MISS - a new noise with clean dishes — Something loose against an arm - check the load before anything else.
Causes, most likely first on this brand
- The tap adapter — The likeliest cause on this brand: it is the only fitting on a countertop machine that holds mains pressure, it is made up by hand every time, and it is where nearly every serious flood with these machines begins.
- The door seal or a deflected spray — Next most likely: the seal keeps water in only while the spray stays where it should, so a tall item catching an arm and throwing water straight at the door produces a leak with a perfectly good gasket.
- Washing-up liquid in the machine — Third on the list: hand dish soap foams enormously in a dishwasher, and the foam pushes out past seals that water alone would never reach.
- Overfilling or an overloaded tub — Least likely, and the only one that is not your work: a machine filled past its level, or packed so tightly that water cannot fall back to the sump, spills at the door.
Check in this order, and why
- Watch the tap adapter while it fills — On a countertop machine this is the only fitting under mains pressure.
- Run a finger round the seal, then look for a tall item catching an arm — A perfect gasket leaks if the spray is being thrown at it.
- Ask what detergent went in — Hand soap makes a healthy machine leak, and nothing else does it so completely.
What an owner can safely check
- Reseat the tap adapter and leave the tap running during the cycle — Most countertop machines draw water through the cycle rather than storing it.
About 15 min
- Reload the machine with nothing face to face and nothing over the upper arm — Then run the same cycle and compare. It costs one wash and settles the commonest cause.
About 20 min
- Run an empty cycle with no detergent at all — If foam and leaking stop, hand soap was the cause.
About 45 min
- STOP HERE if the next step means pulling the machine out or removing a panel — There are live terminals and standing water behind it, and that is where owner checks end.
Before you open anything
Safety
Unplug the machine before reaching into the sump or working on the adapter, and turn the tap off first. A capacitor can hold a charge after the power is off. Go carefully in the sump with a torch: broken glass collects there. Never defeat the door catch to watch it run - the water inside is hot enough to scald.
When to call a technician
Call when the adapter is sound, the detergent is dishwasher detergent, the load is not blocking the arm and water still escapes. Stop using it in the meantime if the leak is at the tap, because that connection stays under pressure whether the machine is running or not, and a worktop machine leaking unattended empties onto a floor.
Nearest pages of this class
What this page does not cover
This page covers countertop dishwashers as a class rather than one model line. Adapter types, door seals and tub designs differ by family, and where a family- or model-specific page exists for your unit it is linked below. Not here: fitting sizes, capacities and part identifiers.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
