Washing machines · Problem

washing machine overfilling with water

A fault with the water inlet valve: The water inlet valve allows water to enter the washing machine drum, and if there is a problem with the washing machine overfilling, this can be caused by a faulty water inlet valve. This is not a fault that you can repair yourself and will require a repair by a trained and qualified plumber.

In short

A washing machine overfilling with water is documented by the manufacturers in this index with 1 possible cause and 1 recommended step. Documented causes include: A fault with the water inlet valve: The water inlet valve allows water to enter the washing machine drum, and if there is a problem with the washing machine overfilling, this can be caused by a faulty water inlet valve. This is not a fault that you can repair yourself and will require a repair by a trained and qualified plumber.

What Bosch documents

Cause: A fault with the water inlet valve: The water inlet valve allows water to enter the washing machine drum, and if there is a problem with the washing machine overfilling, this can be caused by a faulty water inlet valve. This is not a fault that you can repair yourself and will require a repair by a trained and qualified plumber.

What to check:

The water inlet valve allows water to enter the washing machine drum, and if there is a problem with the washing machine overfilling, this can be caused by a faulty water inlet valve. This is not a fault that you can repair yourself and will require a repair by a trained and qualified plumber. The pressure switch, or water level switch, is responsible for sending signals to the water inlet valve to control the flow of hot and cold water into the washing machine according to the temperature setting for a particular programme. If there is a fault with this switch, this can cause the washing machine to overfill. This is not a fault that you can repair yourself and will require a repair by a trained and qualified Bosch engineer. The pressure chamber fills up with air by the rising level of water in the drum. This air is then pushed up the pressure hose and activates the pressure …

Source: Bosch Home UK troubleshooting page, retrieved 3 Nov 2026 Verified

Questions people ask

Frequently asked questions

Why is my washing machine overfilling with water?

The manufacturer documents these causes: A fault with the water inlet valve: The water inlet valve allows water to enter the washing machine drum, and if there is a problem with the washing machine overfilling, this can be caused by a faulty water inlet valve. This is not a fault that you can repair yourself and will require a repair by a trained and qualified plumber.

What should I check first when a washing machine is overfilling with water?

The water inlet valve allows water to enter the washing machine drum, and if there is a problem with the washing machine overfilling, this can be caused by a faulty water inlet valve. This is not a fault that you can repair yourself and will require a repair by a trained and qualified plumber. The pressure switch, or water level switch, is responsible for sending signals to the water inlet valve to control the flow of hot and cold water into the washing machine according to the temperature setting for a particular programme. If there is a fault with this switch, this can cause the washing machine to overfill. This is not a fault that you can repair yourself and will require a repair by a trained and qualified Bosch engineer. The pressure chamber fills up with air by the rising level of water in the drum. This air is then pushed up the pressure hose and activates the pressure switch to commence the wash cycle. If there is a problem with the pressure chamber, such as a blockage, this will interfere with this process and could cause the washing machine to overfill. This is not a fault that you can repair yourself and will require a repair by a trained and qualified Bosch engineer.

Sources

Where these facts come from

Every fact on this page was read from the manufacturer's own product page or document at the address shown, and is labelled with how far it has been checked. Last updated 3 November 2026. Read how we source data, or report an error.