The short answer
The Blomberg DWDI dishwashers are grouped as one platform, and that grouping changes this diagnosis: the same causes apply, in a different order, for reasons of layout. Standing water at the end of a cycle is a blocked path, not a broken pump, in the overwhelming majority of cases. Check outside the machine before inside it. Half of these faults are in the sink waste rather than in the dishwasher.
What you observe on these models
- A smell from the tub between cycles — Standing water and trapped food, which travels with a drainage fault.
- A gurgle from the sink whenever the machine drains — The shared waste line is struggling with the flow rate.
- The pump hums during the drain step but the level does not drop — Powered and obstructed rather than failed.
- NEAR MISS — the dishes are dirty but the tub drains — That is a cleaning fault, not a drainage one.
Causes, most likely first on this family
- Sink waste or air gap restricted — Fourth, because an air gap fitting on the worktop blocks with debris and is easily missed.
- Drain hose kinked, crushed or wrongly routed — Third: the hose runs behind and under the cabinet where it is invisible, and it needs a high loop to work properly.
- Disposer knockout plug never removed — Second, and it is identified instantly by timing — a machine that has never drained since installation has this fault until proven otherwise.
- 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
- Listen during the drain step — A hum with no level change means obstruction. Complete silence means the pump is not being run, which is a different branch.
- Check the air gap fitting on the worktop if there is one — Lift the cover and look for debris. A blocked air gap stops drainage completely and is often the last place anyone looks.
- Look for the high loop in the drain hose — The hose must rise above the level of the tub before falling to the waste, or the machine siphons and never finishes.
- Why this order suits these models — The sequence above is chosen for this family's construction: each step is picked to eliminate as much as possible before anything has to come apart, so the checks that need no panel removed are done first and the ones that do are left until they are the only possibility remaining.
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
What this page generalizes over
This page covers the Blomberg DWDI dishwashers as a family rather than one model. The models in it are close enough to share a diagnosis, but not identical, so where a detail depends on the individual model — a component position, a part number — it is not stated here. The family pages and the brand-level article linked below give the surrounding context.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
