BoilerFaultCodes E83-086 High
Boiler Fault Code E83-086
Also written as E83086 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E83-086 appears across 2 boiler brands and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is struggling to switch between heating your radiators and heating your hot water taps, which may cause one or both to stop working correctly. (As reported on Ideal Mini HE)
Pick your boiler brand for the E83-086 fix
Source
Information for the E83-086 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