BoilerFaultCodes D4 213 High
Boiler Fault Code D4 213
Also written as D4213 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D4 213 appears across 1 boiler brand and 9 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 the water inside is heating up too quickly, which usually means the water isn't circulating properly and triggered a safety shut-off. (As reported on Worcester Bosch Junior 24i)
Pick your boiler brand for the D4 213 fix
Source
Information for the D4 213 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