What this usually is
Dishwasher leaks divide by location: the door seal leaks at the front, the hoses and pump leak underneath, and an overfill leaks from the base. Each has a different first check. On a Aviva dishwasher the order below is what makes this page worth reading — the causes are ranked for this kind of machine, not listed alphabetically.
Recognising it
- Water at the front of the machine along the door — Door seal, door alignment or detergent foam. All three are front-of-machine.
- Water appearing under the cabinet next to the machine — That is a hose or connection leak, and it travels along the base before it emerges.
- Leaks only on certain programmes — Usually the hotter or longer ones, which fill more and run at higher pressure.
- Foam escaping from around the door — The wrong detergent, or a rinse-aid spill in the tub. It is not a seal failure.
- NEAR MISS — damp under the sink rather than the machine — That is the plumbing connection, and the machine may be innocent.
Causes, most likely first
- Door seal worn, dirty or displaced — First. The seal sits where every plate passes and it collects grease and debris; a seal held open by a fragment of food leaks in exactly one place, repeatedly.
- Hose connections at the inlet and waste — Second, and the reason so many leaks appear right after the machine has been moved or a new one fitted: every joint is disturbed at once.
- Detergent foam overflow — Third. Hand-washing liquid or a rinse-aid spill produces foam that walks out of the door and reads as a serious leak until you see the bubbles.
- Tub, sump or pump seal failure — Fourth. These leak under pressure and usually mean the machine has to come out — but they are genuinely the least common of the four.
Working through it
- Dry everything and identify where the first water appears — Front means door; underneath means hoses or pump. That single observation halves the work.
- Run the machine and watch the door face — Water forming a line along the bottom of the door is a seal verdict.
- Look for foam rather than water — Foam is a detergent problem and it is fixed by changing what goes in, not by replacing a part.
The checks worth doing
- Clean the door seal and the sealing face — Wipe all the way round and check for food debris or a section standing proud of its groove.
Tools: clothAbout 20 min
- Check the door closes squarely and the hinges are sound — A dropped door leaks along the top of the seal. Look at how evenly the gap runs down each side.
About 15 min
- Inspect the inlet and waste connections — Hand-tighten the inlet and check the waste clamp. Look for calcium trails, which mark a slow leak precisely.
Tools: flashlight, pliersAbout 25 min
- Run a rinse cycle with no detergent at all — If a foam-related leak disappears, the cause was chemistry rather than hardware.
About 45 min
- STOP before pulling the machine out to chase an underside leak — Sliding a plumbed-in machine out over a leaking hose usually makes the leak worse, and the base holds mains-wired components.
Power, water and the limits of owner work
Safety
Power down at the breaker, close both taps, and lay a towel line before tipping the machine to reach the base. Mains terminals sit within finger reach of wet metal in a cabinet this size, so nothing gets probed while the plug is in. The door lock and its wiring stay as built.
Where owner work ends
Call promptly for any leak you cannot see the source of, because a dishwasher under a counter leaks into a cabinet floor and a chipboard carcass absorbs water for weeks before it shows. Close the isolating valve and stop using the machine while you wait. Say whether the leak is at the front or from underneath — that decides whether it is a door job or a machine-out job.
Related pages for this machine
Where this page stops
This is the generalized entry for Aviva dishwasher units. It deliberately does not carry model-level data, because model-level data is the part that goes wrong when it is copied between families: measured values, replacement part numbers and disassembly sequences. Where the more specific page exists, it is linked and it is the one to use; where it does not, what is here is written to stay true anyway.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
