The short answer
A Miele dishwasher that has stopped mid-cycle and will not restart has usually tripped its base-pan float: water is collecting under the tub and the machine has shut its own inlet off. That is a service call, because the source is inside. A puddle on the floor with the machine still running is different — that is the door seal, foam, or a hose outside the protected path, and those are owner checks.
What you observe
- The machine stopped mid-cycle and will not restart — The base-pan float has tripped. That is a leak report.
- A drain pump running with no cycle selected — The protection system emptying the tub on its own.
- A puddle at the front with the machine running normally — Door seal or foam, outside the protected path.
- Suds visible through the door — Wrong detergent or dose. Test before suspecting a part.
- NEAR MISS — water standing inside the tub at the end — That is a drainage fault, not a leak.
Causes, most likely first on this brand
- Base-pan float tripped by water under the tub — First on this platform because the protection system converts almost every internal leak into a stopped machine rather than a wet floor. The absence of visible water is the clue, not a reason to discount it.
- Excess foam riding over the door seal — Second, and the commonest cause of an actual floor puddle. It is free to prove: one cycle with the correct dose and no additive.
- Door seal fouled or hardened — Third. The seal stiffens with heat and detergent over years, and once it stops recovering its shape it holds only on the high points.
- Supply coupling or drain hose weeping in the cupboard — Last, and easy to confuse with the machine: a sink trap or a tap fitting in the same cupboard drips onto a level floor and tracks to where you see it.
Check in this order, and why
- Note whether the machine stopped itself or is still running — One observation that decides service call versus owner check.
- Look through the door for foam during the wash — Free, and it explains most genuine floor puddles.
- Wipe the door seal and check it springs back — Hardened residue and a dead seal feel quite different.
- Dry the cupboard and run the sink hard with the machine off — Left until last, but it saves a wasted service call.
What an owner can safely check
- Record exactly how the machine stopped — Mid-cycle with no restart is the protection system. Note it.
About 5 min
- Run one cycle with the correct dose and no additive — If the puddle stops, foam was the cause and nothing is broken.
About 90 min
- Clean the door seal and the tub lip it closes against — Warm soapy water. Check the seal recovers when pressed.
Tools: clothAbout 15 min
- Dry the cupboard, then run the sink with the machine idle — Separates a plumbing leak from a dishwasher leak.
Tools: paper towelAbout 15 min
- STOP HERE if the protection has tripped — The source is under the tub. Do not defeat the float.
Before you open anything
Safety
Switch off the breaker before removing the kickplate or reaching under the machine; a capacitor can hold a charge after the power is off, and the supply connection behind the kickplate is live. Never disable, drain-and-ignore or bypass the base-pan float to get the machine running again — it has detected water under the tub, and running past it puts water into your floor instead. Dry standing water before restoring power.
When to call a technician
Call straight away if the machine stopped itself mid-cycle and will not restart, because the protection system has found water under the tub and the source is inside. Call also when a correct-dose cycle still puddles at the front and the seal is clean and springy. Call a plumber instead if the wet patch is at the back of the cupboard and the sink test wets it too. Do not keep resetting a tripped machine.
Nearest pages of this class
What this page does not cover
This page is written for the brand and the appliance class, not for one family or model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer and you should start there. Deliberately absent: float, seal and hose part identifiers, fault-code meanings and service-mode sequences, all of which differ between the built-in, integrated and freestanding families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
