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

Typical repair cost for the boiler No Water Flow Fault fault is £150-300 including labour.

No Water Flow Fault High

Boiler Fault Code No Water Flow Fault

Also written as NOWATERFLOWFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code No Water Flow Fault appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that water is not circulating properly through the system, which means it will stop providing heating or hot water until the flow is restored. (As reported on Ideal Icos System)

Pick your boiler brand for the No Water Flow Fault fix

Ideal No Water Flow Fault 3 models

Source

Information for the No Water Flow Fault fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026