CodeRegistry
Brands
  1. Home
  2. Bosch
  3. Dishwashers
  4. Filling valve knocking
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

Filling valve knocking

Filling valves making knocking noises — Home installation issue

Bosch · Dishwashers

What does Filling valve knocking mean?

During operation, you hear knocking noises coming from the filling valves. This is usually caused by the home's water installation rather than a fault with the dishwasher itself.

Common Causes

  • Issues with the domestic water installation.
  • Water pressure fluctuations in the home's plumbing.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm the noise is coming from the water pipes during the filling cycle.

  2. 2

    Consult a plumber to inspect your home's water installation for potential remedies.

  3. 3

    Note that this noise does not affect the functioning of the appliance.

Browse all codes in this manual (33)
Verified technical data. Last updated: April 2026

Related Faults

All LEDs light or flashAll LEDs light up or flash — Electronics fault detectedAppliance cannot be switched onAppliance cannot be switched on or operated — Power, software, or function failureAppliance does not startAppliance does not start — Power, connection, or door issue
Source: Bosch Dishwashers
Open Manual (Page 33)Search more codes in this manual