--- title: "Dishwasher not cleaning properly" description: "Bosch dishwasher not cleaning properly: dishes coming out gritty, cloudy or with food still on them." url: "https://esbosch.djwp.xyz/symptoms/dishwasher-not-cleaning/" date_modified: "2026-08-21" Appliance type: "Dishwashers" --- # Dishwasher not cleaning properly Symptom # Bosch dishwasher not cleaning properly Dishes coming out gritty, cloudy or with food still on them. In a hard-water city a good share of this is scale and detergent rather than a failed part — and the machine will eventually tell you so with a code of its own. - **From $95** diagnostic, credited to the repair - **59** cities and neighborhoods covered - **OEM** parts available on order - **In writing** the price, before anything is opened ## Book a diagnostic visit Your model number and a line about what it is doing is enough to get started. Your details stay private. No spam, ever. Five ordinary causes ## What this usually turns out to be Cheapest and commonest first, which is also the order we check them in. They sit hundreds of dollars apart, and only the unit settles which one is yours. - A blocked filter Food that cannot leave gets redistributed over the load. Twists out by hand and is the first thing to look at. [ Dishwasher drain repair from $145 ](https://esbosch.djwp.xyz/services/dishwasher-drain-repair/) ### A blocked filter Food that cannot leave gets redistributed over the load. Twists out by hand and is the first thing to look at. - Spray arms not turning Blocked jets, or a tall item on the lower rack stopping the arm. Spin each one by hand with the racks in — they should move freely. ### Spray arms not turning Blocked jets, or a tall item on the lower rack stopping the arm. Spin each one by hand with the racks in — they should move freely. - Scale in the machine A white film on glass and a machine that does not rinse well. South Florida water is hard and these machines publish a code for it, which is unusually honest. [ Maintenance & descaling from $145 ](https://esbosch.djwp.xyz/services/appliance-maintenance/) ### Scale in the machine A white film on glass and a machine that does not rinse well. South Florida water is hard and these machines publish a code for it, which is unusually honest. - Not hot enough If the water is not reaching temperature, nothing else on the list matters. That points at the heat pump and it is the real repair here. [ Dishwasher heating & drying repair from $220 ](https://esbosch.djwp.xyz/services/dishwasher-heating-and-drying-repair/) ### Not hot enough If the water is not reaching temperature, nothing else on the list matters. That points at the heat pump and it is the real repair here. - Detergent and loading Tablets that do not dissolve in a short cycle, a blocked dispenser flap, or a load packed tight enough to shield the lower rack. ### Detergent and loading Tablets that do not dissolve in a short cycle, a blocked dispenser flap, or a load packed tight enough to shield the lower rack. In five minutes ## Before you call anybody None of it needs tools, and all of it makes the visit shorter. - 01 Spin both spray arms by hand With the racks loaded as you normally load them. If a handle or a baking sheet stops one, that is your answer. ### Spin both spray arms by hand With the racks loaded as you normally load them. If a handle or a baking sheet stops one, that is your answer. - 02 Hold an arm up to the light Blocked jets show immediately. A toothpick clears them, and the arms usually unclip without tools. ### Hold an arm up to the light Blocked jets show immediately. A toothpick clears them, and the arms usually unclip without tools. - 03 Look for a white film On glass in particular. Film is scale; grit is the filter. They are different problems and they look nothing alike once you know. ### Look for a white film On glass in particular. Film is scale; grit is the filter. They are different problems and they look nothing alike once you know. - 04 Run a hot cycle with a descaler Empty. If everything improves noticeably, you had scale, and it is worth doing on a schedule from now on. ### Run a hot cycle with a descaler Empty. If everything improves noticeably, you had scale, and it is worth doing on a schedule from now on. How it shows up ## What people describe when they call - “Grit left in glasses and cups” - “A white film on everything” - “Food still on the lower rack” Two shortcuts ## Narrow it down before anybody arrives A description of the behaviour leaves a few possible causes. A code names the subsystem, and the model number says which parts to bring. Either one shortens the visit; both together usually settle it. If the display is showing something - [ E12 Scale build-up ](https://esbosch.djwp.xyz/error-codes/error-code-e12/) - [ E22 Filter blocked ](https://esbosch.djwp.xyz/error-codes/error-code-e22/) Photograph it before it clears — codes do not wait. [ Search the full code list ](https://esbosch.djwp.xyz/error-codes/) If there is no code at all The data plate is inside the cabinet, upper left wall or behind the grille. [ All models ](https://esbosch.djwp.xyz/models/) In more detail ## About Bosch dishwasher not cleaning properly ### The fastest diagnosis is the code If the machine has shown a code about scale in the heat pump, start there — descaling is a maintenance job and it is the cheapest thing on this page. Left long enough it becomes the most expensive. ### Grit and film are two different problems **Grit** — sand-like debris in cups and glasses — is food that could not leave the machine. Filter, spray arms, drainage. **Film** — a dull white haze on glass — is minerals from the water. Descaling and rinse aid. They arrive together often enough to be confused, and they are fixed by completely different things. ### The code worth acting on These machines publish a code specifically for scale building up in the heat pump. Very few appliances tell you this. Acting on it is a maintenance visit; ignoring it for a year means replacing the heat pump, which is the most expensive part in the machine. This article is based on: - Official manufacturer documentation - Internal repair procedures - Technician repair history - Company quality standards Before you book ## Questions about bosch dishwasher not cleaning properly Scrape, do not rinse. These machines detect how dirty the water is and adjust the cycle — a rack of pre-rinsed dishes gets a short, cool cycle, which is the opposite of what a genuinely dirty load needs. On glass it eventually is — etching cannot be reversed. Scale on the machine and film on new glassware both come off, so it is worth acting early. It helps, and it is a decision about the whole house rather than the dishwasher. Regular descaling gets most of the benefit for the appliance alone. 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