---
title: "Dishwasher error code F40"
description: "Asko dishwasher error code F40: The machine has detected flow at a moment when it had the valve closed, which means the valve is passing."
url: "https://askomiami.support/error-codes/dishwasher-f40/"
date_modified: "2026-09-13"
Appliance type: "Dishwashers"
---


# Dishwasher error code F40

### What F40 means on this make

The machine has detected flow at a moment when it had the valve closed, which means the valve is passing. Treat it as urgent rather than as an inconvenience: this is the one that quietly fills an appliance overnight, and behind a custom panel the water is in the cabinetry before anybody notices. On an Outdoor door F:40 is a thermistor problem.

### Where this appears, and which table it belongs to

On the appliance’s own display. Photograph it before you cut the power: a display that has been cleared has taken the evidence with it, and there is no way to ask the machine for it again. Then check the model, because this make changed hands in 2016 and the two generations share no code string. The same characters mean different things on a Classic ERC oven, an ER-series range and a Modernist induction cooktop, and a meaning read off the wrong table is worse than no meaning at all.

### Which machines this one applies to

DFI5558, DSD746, DBI675 and the D-series display machines. The same number on a different appliance of this make is a different page and often a different repair, which is why this archive is organized by appliance rather than by number. This maker documents codes on 8 of the appliance types this site publishes — cooktop, dishwasher, dryer, microwave, oven, range, refrigerator and washer — and publishes none at all for commercial line, freezer, microwave, oven, range, range hood and refrigerator. Those appliances have symptom pages here and no code pages, which is the honest answer rather than borrowing a table from the machine next door.

### What to do about it

- Close the service valve under the sink now and leave it closed.
- The valve is replaced rather than cleaned — one that has started to pass does not recover.

### Where this goes next

The job this usually becomes is [diagnostic visit](/services/diagnostic-visit/), and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 363-1406](tel:+13053631406) and describe what the panel is doing before booking anything.

DFI5558, DSD746, DBI675 and the D-series display machines

What this one means

What F40 means on this make

The machine has detected flow at a moment when it had the valve closed, which means the valve is passing. Treat it as urgent rather than as an inconvenience: this is the one that quietly fills an appliance overnight, and behind a custom panel the water is in the cabinetry before anybody notices. On an Outdoor door F:40 is a thermistor problem.

Where this appears, and which table it belongs to

On the appliance’s own display. Photograph it before you cut the power: a display that has been cleared has taken the evidence with it, and there is no way to ask the machine for it again. Then check the model, because this make changed hands in 2016 and the two generations share no code string. The same characters mean different things on a Classic ERC oven, an ER-series range and a Modernist induction cooktop, and a meaning read off the wrong table is worse than no meaning at all.

Which machines this one applies to

DFI5558, DSD746, DBI675 and the D-series display machines. The same number on a different appliance of this make is a different page and often a different repair, which is why this archive is organized by appliance rather than by number. This maker documents codes on 8 of the appliance types this site publishes — cooktop, dishwasher, dryer, microwave, oven, range, refrigerator and washer — and publishes none at all for commercial line, freezer, microwave, oven, range, range hood and refrigerator. Those appliances have symptom pages here and no code pages, which is the honest answer rather than borrowing a table from the machine next door.

What to do about it

Close the service valve under the sink now and leave it closed.

The valve is replaced rather than cleaned — one that has started to pass does not recover.

Where this goes next

The job this usually becomes is diagnostic visit, and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 363-1406](tel:+13053631406) and describe what the panel is doing before booking anything.

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**[Read full article: Dishwasher error code F40](https://askomiami.support/error-codes/dishwasher-f40/)**