Miele dishwasher: the short answer
On a Miele dishwasher, dishes coming out dirty, gritty or filmed most often comes back to filter and sump loaded with soil recirculating dirt, with hard water scaling the machine and filming the glass the next thing to rule out. Miele performance depends on the filter, the correct detergent and — in hard water — the salt and hardness setting; on this brand that is the first thing to rank, not the last. The first checks below are owner-safe and need no tools beyond a flashlight; if they come back clean, what is left sits behind a panel and belongs to a technician.
What you are actually seeing
- Food soil left on dishes, particularly on the upper rack
- A gritty deposit on glasses and in cup bases
- Not this fault: Dishes clean but wet — Means: a drying problem rather than a wash problem
Ranked for Miele, most likely first
- Filter and sump loaded with soil recirculating dirt — Why: A blocked filter means the machine washes the load in water it has already dirtied, which is the most common reason for a gritty result. — Owner serviceable: true — Brand note: Miele performance depends on the filter, the correct detergent and — in hard water — the salt and hardness setting; on this brand that is the first thing to rank, not the last.
- Hard water scaling the machine and filming the glass — Why: Scale coats the heater, the arms and the glass, and on platforms with a softener it means the salt or the hardness setting is wrong. — Owner serviceable: true
- Detergent old, damp or the wrong dose — Why: Dishwasher detergent loses activity in a damp cupboard, and a tablet that will not dissolve leaves a load washed in plain water. — Owner serviceable: true
- Loading blocking the spray path — Why: A tall item or an overlapping plate shadows the rack behind it, and no amount of repair will change that. — Owner serviceable: true
- Body: The order below is specific to how Miele builds this appliance; on another platform the same list ranks differently.
What to check, in this order, and why
- Miele reports faults as an F-series code held in the control; read it before power-cycling, and check the water hardness setting and the salt before anything else. — Why: This one comes first because of how Miele builds the machine, not because of where the fault ranks.
- Twist out the filter and hold the mesh up to the light. — Why: Mesh you cannot see through is recirculating soil onto the load.
- Look for scale on the heater, the arms and inside the door, and check the salt on platforms that use it. — Why: Scale is visible and it points at water treatment rather than a fault.
The checks you can safely do yourself
- Clean the filter and sump — Tools: Gloves, a soft brush, warm soapy water — Time: About twenty minutes — Body: Switch off at the breaker.
- Use fresh detergent and check it dissolves — Tools: A fresh pack of detergent — Time: One cycle — Body: Open a new pack rather than using one that has been sitting in a damp cupboard, load it into the closed dispenser rather than throwing it in the tub, and confirm the dispenser is empty at the end of the cycle.
- Body: Stop at the first step that would need a meter on live terminals.
Before you open anything
Safety
Never defeat a door interlock, a lid switch or a safety thermostat to keep an appliance running. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off.
Where the owner line ends
Call a technician in any of these situations. the filter, the arms, the loading and the detergent are all correct and the results are unchanged
The nearest pages to this one
What this page does not cover
This is generalized information for Miele dishwashers as a family. It does not carry the model-specific detail — code tables, part numbers tied to a serial range, a chassis-specific procedure — and it defers to any page written for your exact model. Miele Dishwasher: Controls or Error Code — Slug: miele-dishwasher-control-fault — Relation: a different fault on the same appliance Miele Dishwasher: Not Draining — Slug: miele-dishwasher-drainage-failure — Relation: a different fault on the same appliance Miele Dishwasher: Not Heating — Slug: miele-dishwasher-heating-failure — Relation: a different fault on the same appliance
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
