BoilerFaultCodes B07 Medium
Boiler Fault Code B07
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code B07 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is having trouble switching between heating your radiators and providing hot water because an internal switch has failed to trigger. (As reported on Ariston Euro Prisma 24)
Pick your boiler brand for the B07 fix
Source
Information for the B07 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