The short answer
On the Blomberg DWDI dishwashers specifically, this fault sits one level below the brand-generic answer: the models in this family share a layout, and that layout changes which check comes first. A dishwasher leak is dangerous out of proportion to its size, because the machine sits under a worktop where the water is invisible until it has done damage. Check for the wrong detergent before dismantling anything — hand dish soap in a dishwasher produces a dramatic leak with no fault present.
What you observe on these models
- 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.
- Water appearing from under the kickplate — A connection, a hose or the pump inside the cabinet.
- NEAR MISS — dishes are wet and the floor is dry — That is drying performance, which is a different subject entirely.
Causes, most likely first on this family
- Drain hose connection loose or split — Fourth: the connection at the waste is disturbed whenever anything under the sink is worked on, and it only leaks during the drain step.
- Supply connection or inlet valve weeping — Third, because under a worktop a slow weep can run for months before anyone sees standing water.
- Door seal perished, displaced or fouled — Second, and it is identified by water arriving at the front of the machine during the wash rather than at any other time.
- Where this order differs from the brand-generic page — On this family the access route decides the sequence. The cause that moves up is the one reachable without removing a panel on these models, and the cause that moves down is the one that needs the cabinet opened — so the ranking here is ordered by what this platform lets you confirm first, not only by raw likelihood.
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.
- What the family layout dictates here — On these models the components involved are not equally accessible, and the order reflects that. Working it as written means you reach a conclusion with the least disassembly, which matters more on this platform than on a machine where everything is behind one panel.
Before you open anything
Safety
Isolate the machine before any inspection. The door latch is a safety interlock; never defeat it to run a cycle with the door open, and never run the machine with the kickplate removed.
When to call a technician
Call once the filter and arms are clean, the seal is sound, the isolator is on and the valve is open, and the fault is still there. Any water behind the kickplate that is not from an obvious fitting is a call on its own.
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.
