BoilerFaultCodes D1 286 High
Boiler Fault Code D1 286
Also written as D1286 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D1 286 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 has detected that the water returning to it is too hot, causing it to shut down to prevent damage from overheating. (As reported on Worcester Bosch Greenstar 12i System)
Pick your boiler brand for the D1 286 fix
Source
Information for the D1 286 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