The short answer
For the Blomberg DDS family of dishwashers, the generic answer is not wrong but it is not ordered for these models. What follows is the order that suits this platform. Suds are the most commonly missed cause of a dishwasher leak, and they are not a fault at all. A leak under a worktop deserves urgency even when it is small, because the cabinet and the floor absorb it silently.
What you observe on these models
- Foam or suds visible around the door edge — Detergent, not a mechanical fault.
- Water present even when the machine is off — A supply fitting, which is the one leak that never stops on its own.
- Water only on cycles with a heavy load — Spray deflected at the door by an item in the rack rather than a failed seal.
- NEAR MISS — the floor is wet but the sink waste is also backing up — A blocked shared waste line puts water on the floor without the dishwasher leaking at all.
Causes, most likely first on this family
- Supply connection or inlet valve weeping — Third, and it is the most urgent entry on this page for exactly that reason.
- Door seal perished, displaced or fouled — Second: the door gasket runs around the whole opening, takes wear every time the door closes, and traps debris along its lower edge.
- Wrong detergent or too much of it — Ranked first because the fault is not in the machine at all, and no amount of inspection will find anything wrong.
- The departure from the page above this one — The generic article lists these causes in frequency order across every model the brand sells. Here the ordering also accounts for how this family is built — which panel comes off first, and which component is behind it — and that pushes the accessible causes up.
Check in this order, and why
- Establish where the first water appears — Front of the door, under the kickplate, or under the sink. Those three locations have almost no causes in common.
- Watch which part of the cycle produces the water — Fill, wash or drain — each implicates a different connection, and the distinction is free.
- Check the supply fitting with a dry fingertip when the machine is idle — Any dampness there is a pressurised leak and it takes priority over everything else.
- The access logic behind this sequence — Each step above is ordered by how much it rules out per minute spent. On this family that puts the external and audible checks first and anything requiring a panel last, which is the opposite of the order most people work in instinctively.
Before you open anything
Safety
Power off at the isolator, supply valve closed, before opening anything. Do not attempt to draw the machine out from under the worktop while its supply, waste and mains connections are still attached.
When to call a technician
Call when the cheap checks are clean and the problem remains. A leak that is not at the door, the detergent or a visible connection is an immediate call — the cabinet and subfloor absorb water long before the kitchen floor shows it.
Other faults covered for this family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
