201 Low

Boiler Fault Code 201

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 201 appears across 2 boiler brands and 25 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is simply indicating that it is currently busy heating your hot water, which is a normal operating status rather than a breakdown. (As reported on Worcester Bosch 26 CDi Xtra)

Pick your boiler brand for the 201 fix

Atag 201 13 models Worcester Bosch 201 12 models

Source

Information for the 201 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 31 August 2026