The answer first
The door seal on a dishwasher is what keeps hot water inside a cabinet full of kitchen units, so a failed one shows up as a leak at the front or as steam escaping where it should not. 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.
What owners actually report
- Water running down the front of the door — A seal that is not compressing, or is being held open by debris.
- Steam escaping at the top or the sides during the cycle — The early stage. Steam finds a gap long before liquid water does.
- The seal is hard, cracked or standing out of its groove — Visible on inspection and conclusive.
- The door needs a firm shove to latch — A swollen or displaced seal fights the latch, which also wears the latch.
- NEAR MISS — water underneath but the door face is dry — That is a hose or pump leak travelling along the base, not a seal problem.
Ranked causes on this platform
- Grease and debris on the seal face — First, and the most fixable: the seal sits where every dirty plate passes, and a film of grease with a seed or a label in it holds the seal open a fraction at exactly one point.
- Seal hardened with age and heat — Second. Repeated hot cycles drive the plasticiser out of the rubber, so it takes a set and no longer springs back against the door.
- Seal displaced from its groove — Third, usually after cleaning or after something has been dragged past it. A displaced section leaks constantly and is easy to see.
- Door alignment or hinge wear — Fourth. A door that has dropped compresses the seal unevenly, and no amount of new rubber fixes a door that does not close square.
Check in this order, and why
- Run a finger round the whole seal — Greasy, hard or displaced sections are found by touch faster than by eye.
- Watch the door edges during a hot cycle — Steam marks the leak point precisely, and it does it before water does.
- Close the door and look at the gap down each side — An uneven gap is an alignment verdict, and it changes the repair entirely.
What an owner can safely check
- Clean the seal and the tub lip it meets — Warm soapy water and a cloth all the way round, including the underside of the lip where grease collects.
Tools: clothAbout 20 min
- Press any displaced section back into its groove — Work from the middle of the displaced run outwards so you are not left with a bulge at one end.
About 15 min
- Check the seal for hardness — It should compress under a thumb and spring back. A seal that stays dented is finished.
About 10 min
- Tighten the door hinge and handle fixings — Loose fixings let the door move; tightening them restores even compression across the seal.
Tools: screwdriverAbout 20 min
- STOP before replacing the seal on a built-in machine — The machine usually has to come out of the cabinet to fit the lower seal correctly.
Before you open anything
Safety
Disconnect the power at the breaker and close the inlet tap before you open anything. Expect standing water in the sump and put towels down first; a wet floor around a powered machine is the real hazard here, not the repair itself. The door lock stays connected exactly as the factory wired it.
When this stops being a home job
Cleaning the seal and the lip it meets is genuinely worth doing first, because grease and debris cause more of these leaks than perished rubber does. Beyond that, a built-in machine has to come out to be worked on safely, with the water isolated and the supply off. When you book, say whether you are seeing steam or water — steam is the early warning and a cheaper visit.
Related pages for this machine
How specific this page is
This page is generalized across the Aviva dishwasher line: it covers the appliance class rather than one family or one model line. Where a family- or model-specific page exists for your unit it is the better answer and it is linked from this page — check the model label before you rely on anything here. What is deliberately not on this page: wiring colours, board part numbers, torque figures and teardown order, 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.
