How much does it cost to fix boiler error code E83-086?

Typical repair cost for the boiler E83-086 fault is £180-300 including labour.

E83-086 High

Boiler Fault Code E83-086

Also written as E83086 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code E83-086 appears across 2 boiler brands and 3 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 directing heat properly between your radiators and your taps, which usually means it is stuck providing only hot water or only heating. (As reported on Biasi Riva Compact 24S (M90E.24S))

Pick your boiler brand for the E83-086 fix

Biasi E83-086 1 model Ideal E83-086 2 models

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 31 August 2026