--- title: "Dishwasher not cleaning" description: "Samsung dishwasher not cleaning — samsung makes a point on their own support pages that matches what we find: when something is genuinely wrong with a…" url: "https://samsungmiami.support/symptoms/dishwasher-not-cleaning/" date_modified: "2026-09-04" Appliance type: "Dishwashers" --- # Samsung dishwasher not cleaning ### Run the tap first Run the kitchen hot tap until it is genuinely hot, then start the dishwasher. A machine fed with the cold water sitting in the pipe never recovers the temperature during the cycle, and on a short program it will not clean or dry properly however healthy it is. It is free, and it changes the result more often than any part. ### What it usually means, by the kind of Samsung appliance Samsung sells one appliance in several forms, and the same behavior points at different things on each of them. A built-in side-by-side and an integrated column are not the same service situation, and a dual-fuel range and an induction range fail in different halves. - **WaterWall** — A reflector sweeps the tub. Blocked or obstructed, it cleans one end and not the other — and Samsung has a code for it, 7E. - **Linear Wash** — A moving bar rather than a rotating arm. The same logic applies: check its path is clear. - **StormWash and rotary** — Conventional arms, so blocked jets and a tall item stopping an arm are the usual causes. ### Why temperature matters more than anything else Dishwasher detergent is chemistry and chemistry runs on heat. Below about 120°F the enzymes that break down food do very little and the surfactants that lift grease do less. A machine plumbed to a cold line, or fed from a long pipe run that has to be flushed first, is working at a disadvantage on every cycle. ### The uneven-cleaning tell Dishes clean at one end of the rack and dirty at the other is a mechanical clue, not a chemical one. On a rotary machine that is an arm that cannot turn; on a WaterWall it is a reflector that cannot travel, which Samsung reports as 7E; on Linear Wash it is the bar’s path. Evenly poor cleaning everywhere is temperature, detergent or the filter. Inlet water temperature The most common cause of clean-but-not-clean. Free to test and free to fix. Spray arms blocked or obstructed A jet blocked with a seed, or a tall item stopping an arm turning. A dirty filter recirculates what it just took off the dishes. Detergent and rinse aid Old detergent loses its enzymes. Rinse aid is what stops film on glass. The WaterWall reflector Samsung's 7E. Cleans unevenly rather than badly, which is the tell. Run the hot tap before starting Until it runs hot. Then start the machine. Spin both arms by hand They should turn freely and every hole should be clear. Clean the filter And look at what comes off it. Check the loading Nothing overhanging into an arm's path, nothing nested, and bowls facing down. Check the detergent is not old Powder and tablets lose effectiveness after a year in a humid kitchen. Food left on the dishes and film on the glasses What it usually means If nothing else is wrong, this is usually not a repair Inlet water temperature is the most common single cause WaterWall, Linear Wash and StormWash each fail differently Run the tap first Run the kitchen hot tap until it is genuinely hot, then start the dishwasher. A machine fed with the cold water sitting in the pipe never recovers the temperature during the cycle, and on a short program it will not clean or dry properly however healthy it is. It is free, and it changes the result more often than any part. What it usually means, by the kind of Samsung appliance Samsung sells one appliance in several forms, and the same behavior points at different things on each of them. A built-in side-by-side and an integrated column are not the same service situation, and a dual-fuel range and an induction range fail in different halves. WaterWall — A reflector sweeps the tub. Blocked or obstructed, it cleans one end and not the other — and Samsung has a code for it, 7E. Linear Wash — A moving bar rather than a rotating arm. The same logic applies: check its path is clear. StormWash and rotary — Conventional arms, so blocked jets and a tall item stopping an arm are the usual causes. Why temperature matters more than anything else Dishwasher detergent is chemistry and chemistry runs on heat. Below about 120°F the enzymes that break down food do very little and the surfactants that lift grease do less. A machine plumbed to a cold line, or fed from a long pipe run that has to be flushed first, is working at a disadvantage on every cycle. The uneven-cleaning tell Dishes clean at one end of the rack and dirty at the other is a mechanical clue, not a chemical one. On a rotary machine that is an arm that cannot turn; on a WaterWall it is a reflector that cannot travel, which Samsung reports as 7E; on Linear Wash it is the bar’s path. Evenly poor cleaning everywhere is temperature, detergent or the filter. ### White film on everything, especially glass. That is usually rinse aid and water hardness rather than the machine. South Florida water leaves deposits, and a machine that has never had rinse aid in it shows this first on glass. ### It got worse after I switched detergent. Then the detergent is a real suspect. Gel is generally weaker than a tablet, and some tablets need a longer program than the one being run to dissolve fully. --- **[Read full article: Dishwasher not cleaning](https://samsungmiami.support/symptoms/dishwasher-not-cleaning/)**