BoilerFaultCodes CH flow sensor fault High
Boiler Fault Code CH flow sensor fault
Also written as CHFLOWSENSORFAULT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code CH flow sensor fault appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's temperature sensor is struggling to communicate with the main control board, which is preventing your heating from operating correctly. (As reported on Worcester Bosch Greenstar i)
Pick your boiler brand for the CH flow sensor fault fix
Source
Information for the CH flow sensor 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 27 April 2026