How much does it cost to fix Baxi error code No Water Flow?

Typical repair cost for the Baxi No Water Flow fault is £150-250 including labour.

No Water Flow High

Baxi No Water Flow Fault Code

Q: What does the Baxi No Water Flow fault code mean?

Your boiler is struggling to detect the movement of water inside the system, causing it to continuously restart its internal pump instead of heating your home.

Also written as NOWATERFLOW — same fault.

The Baxi No Water Flow fault code means: your boiler is struggling to detect the movement of water inside the system, causing it to continuously restart its internal pump instead of heating your home.. It appears on 3 Baxi models in our database.

Technical description: Indicated by the flow switch - a continuous cycle of Pump Overrun and Anti-cycle occurs.

Typical repair cost £150-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Baxi models that show the No Water Flow fault code

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

Source

Baxi No Water Flow fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

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