High
Incorrect water flow rate on Worcester Bosch WR325 RSF

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

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

From this model's manual
Verified against the Worcester Bosch Wr325 Rsf installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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