Incorrect water flow rate High

Worcester Bosch Incorrect water flow rate Fault Code

Q: What does the Worcester Bosch Incorrect water flow rate fault code mean?

Your boiler is struggling to detect the flow of water needed to heat your taps, usually because the incoming water supply is restricted or a internal sensor is stuck.

Q: How much does it cost to fix Worcester Bosch error code Incorrect water flow rate?

Typical repair cost for the Worcester Bosch Incorrect water flow rate fault is £120-250 including labour.

Also written as INCORRECTWATERFLOWRATE — same fault.

The Worcester Bosch Incorrect water flow rate fault code means: your boiler is struggling to detect the flow of water needed to heat your taps, usually because the incoming water supply is restricted or a internal sensor is stuck.. It appears on 1 Worcester Bosch model in our database.

Technical description: Incoming supply valve closed, Low water pressure, or Water section sticking or faulty

Typical repair cost £120-250 (including labour)

DIY fix possible

Check that the isolation valve on the cold water mains pipe leading to your boiler is fully open.Check all taps in your home to ensure you have normal mains water pressure.Restart the boiler using the reset button to see if it clears the temporary fault.

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Worcester Bosch models that show the Incorrect water flow rate fault code

Click a model for the full fault code list and model-specific repair notes.

WR325 RSF Repair: £120-250

Source

Worcester Bosch Incorrect water flow rate fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026