--- title: "Dishwasher leaking" description: "Thermador dishwasher leaking — water on the floor, or a machine that will not start and shows E15." url: "https://thermadormiami.support/symptoms/dishwasher-leaking/" date_modified: "2026-08-18" Appliance type: "Dishwashers" --- # Dishwasher leaking Symptom # Thermador dishwasher leaking Water on the floor, or a machine that will not start and shows E15. The lockout is a protection working rather than a failure, and it clears once the pan is dry and the cause is found. - **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. - The door seal It hardens with age and stops gripping along the bottom edge first, which is exactly where nobody looks. Water then runs down the front of the cabinetry rather than into the pan. [ Door seal and hinge repair from $165 ](https://thermadormiami.support/services/door-seal-and-hinge-repair/) ### The door seal It hardens with age and stops gripping along the bottom edge first, which is exactly where nobody looks. Water then runs down the front of the cabinetry rather than into the pan. - Connections behind the machine Supply and drain fittings, and the air gap at the sink. Not the appliance at all, and common after anything has been moved. [ Dishwasher leak repair from $175 ](https://thermadormiami.support/services/dishwasher-leak-repair/) ### Connections behind the machine Supply and drain fittings, and the air gap at the sink. Not the appliance at all, and common after anything has been moved. - The sump and its seals A slow drip under the tub that fills the base pan over days. This is the one that gets found only when the machine finally stops. [ Dishwasher leak repair from $175 ](https://thermadormiami.support/services/dishwasher-leak-repair/) ### The sump and its seals A slow drip under the tub that fills the base pan over days. This is the one that gets found only when the machine finally stops. - The inlet valve A valve that seeps when it is closed puts water in the pan while the machine is not even running. [ Dishwasher leak repair from $175 ](https://thermadormiami.support/services/dishwasher-leak-repair/) ### The inlet valve A valve that seeps when it is closed puts water in the pan while the machine is not even running. - Too much detergent, or the wrong kind Foam escapes past seals that are otherwise perfect. Worth ruling out first because it costs nothing. ### Too much detergent, or the wrong kind Foam escapes past seals that are otherwise perfect. Worth ruling out first because it costs nothing. In five minutes ## Before you call anybody None of it needs tools, and all of it makes the visit shorter. - 01 Turn off the water The shut-off valve under the sink, before anything else. The machine is safe sitting in its lockout; the floor under it may not be. ### Turn off the water The shut-off valve under the sink, before anything else. The machine is safe sitting in its lockout; the floor under it may not be. - 02 Look at the door seal along the bottom Run a finger round it. Hard, flattened or torn at the lower corners is the commonest single cause and it is a cheap part. ### Look at the door seal along the bottom Run a finger round it. Hard, flattened or torn at the lower corners is the commonest single cause and it is a cheap part. - 03 Check behind and under The fittings at the back and the floor of the cabinet. Water that reaches the toe kick has usually been going on longer than anybody thinks. ### Check behind and under The fittings at the back and the floor of the cabinet. Water that reaches the toe kick has usually been going on longer than anybody thinks. - 04 Dry the base pan if you can Off at the breaker, tipped gently back on a towel for a few minutes, left overnight. If the code clears and never returns, the water was a one-off. ### Dry the base pan if you can Off at the breaker, tipped gently back on a towel for a few minutes, left overnight. If the code clears and never returns, the water was a one-off. How it shows up ## What people describe when they call - “E15 and the anti-flood lockout” - “A damp patch at the front of the cabinetry” - “A machine that runs, then stops mid-cycle” 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 - [ E16 No water arriving ](https://thermadormiami.support/error-codes/error-code-e16-dishwasher/) - [ E18 Water level too low ](https://thermadormiami.support/error-codes/error-code-e18-dishwasher/) - [ E15 Water in the base ](https://thermadormiami.support/error-codes/error-code-e15-dishwasher/) Photograph it before it clears — codes do not wait. [ Search the full code list ](https://thermadormiami.support/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://thermadormiami.support/models/) In more detail ## About Thermador dishwasher leaking ### The fastest diagnosis is the code E15 means water reached the base pan and the machine locked itself out on purpose. It does not say where the water came from — that is the diagnosis — and the machine will run again normally once the pan is dry and the leak is fixed. ### The lockout is not the problem This platform puts a float in the base pan and stops the machine when it lifts. The code that follows tells you water arrived somewhere it should not be. It does not tell you where from, and it does not mean the machine is broken — a dishwasher that will not start with a leak code is doing precisely what it was designed to do. ### Where it usually comes from - The door seal, hardened at the bottom corners - The sump and its connections — the slow one that fills the pan over days - The inlet valve, which leaks closed rather than open - Fittings behind the machine that were never the appliance - Detergent foam, which is free to rule out and worth ruling out first This article is based on: - Official manufacturer documentation - Internal repair procedures - Technician repair history - Company quality standards Before you book ## Questions about thermador dishwasher leaking That is the anti-flood lockout, and it is deliberate. A float in the base pan has lifted and the machine has stopped rather than risk a flood. Once the pan is dry and the cause is dealt with, it runs normally. Because the pan is under the tub, inside the machine. A slow drip from the sump fills it over days without a drop ever reaching your kitchen — which is exactly what the pan is for. You can clear it, and it will come straight back if water is still arriving. Clearing a protection without finding what set it off is how a small leak becomes a cabinet floor. 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