The Short Answer
A Miele dishwasher that won't start usually has a door locking clip that isn't confirming closed — worn, misaligned, or occasionally just needing a firmer push. One that won't drain or leaves cloudy residue is nearly always a filter or drain-path blockage rather than a failed pump. And a dishwasher that seems to have stopped dispensing detergent has usually run its AutoDos cartridge dry or been fed the wrong detergent type. All three are quick, inexpensive fixes once correctly identified.
Won't Start: The Locking Clip
Miele dishwashers use a locking clip mechanism on the door that must fully engage and electrically confirm closed before the control will begin a cycle — a safety feature, not an inconvenience. Years of daily use wear the clip and its strike plate slightly, and a door that used to close with a light push starts needing a firmer one, or eventually stops confirming at all. The panel stays lit, buttons respond, and nothing happens — which reads as electronic failure but is almost always this one mechanical part. Realigning or replacing the clip assembly is routine, same-day work for our dishwasher repair technicians.
Drain Faults and Cloudy Residue
Standing water or a white film on glassware sends most owners straight to worrying about the pump, but the honest first suspects sit lower down: the coarse and fine filters in the tub floor clogged with food residue, or a drain hose installed without the proper high loop, letting sink water siphon back in. Cloudy glassware specifically is often water hardness rather than a fault at all — Miele dishwashers have a built-in water softener that needs its own salt reservoir topped up periodically, separate from the detergent. A pump that hums with everything else confirmed clear is the genuine mechanical fault, and a comparatively rare one on these machines.
“Owners bring us a Miele convinced the pump has failed. Four times out of five, the truth is sitting in the filter basket, or in the salt reservoir nobody's topped up in a year.”
Field note — The Technician Team
Keeping AutoDos Working
Miele's AutoDos system draws liquid detergent from a reservoir cartridge in the door and doses it automatically each cycle, calibrated to the load size and soil level it detects. It fails quietly in two ways: the cartridge simply runs dry, or someone refills it with a detergent not designed for the automatic dosing nozzle, which can gum up the small dispensing mechanism. Keep genuine Miele detergent in the cartridge and top it up before it's empty, and AutoDos runs for years without attention. A dishwasher that's stopped dispensing anything despite a full cartridge has a dosing pump worth having checked.
The Filters Underneath — Worth a Look Anyway
Beneath the lower spray arm, Miele's combined coarse-and-fine filter assembly catches everything a plate leaves behind, and it's designed to lift out for cleaning without tools. A quarter-turn releases it, a rinse under the tap and a soft brush clear it, and reseating takes seconds. This single habit, done monthly, prevents a large share of the drain and residue complaints above — and it's the same principle that governs every dishwasher we service, Miele included, in our dishwasher maintenance guide.
Miele Dishwasher Questions
How do I reset a Miele dishwasher?
Cut power at the breaker for about a minute, then restore it and start a short cycle — that reboots the electronics and clears a one-off glitch. Miele’s own troubleshooting guidance recommends this before anything else. If a fault code or symptom returns after one clean power cycle, the control board has already told you it isn’t a software problem.
Why is my Miele dishwasher door hard to close?
The locking clip and its strike plate wear slightly over years of use, and a door that used to click shut easily starts needing an extra push — or stops confirming closed at all, which the control reads as an open door and refuses to start. Realigning or replacing the clip assembly restores the original feel and is a routine, same-day repair.
What is AutoDos and why does it need maintenance?
AutoDos is Miele’s automatic detergent dispensing system, drawing liquid detergent from a reservoir cartridge and dosing it precisely each cycle rather than relying on a pod or powder measured by hand. It needs the cartridge kept filled with genuine Miele detergent and its small dosing nozzle kept clear — using the wrong detergent type or letting the cartridge run dry are the two most common ways owners accidentally disable it.