BoilerFaultCodes 201 Low
Boiler Fault Code 201
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 201 appears across 1 boiler brand and 24 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 letting you know that it is currently busy heating up your tap water and is working as expected. (As reported on Worcester Bosch GB162)
Pick your boiler brand for the 201 fix
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 27 April 2026