BoilerFaultCodes F85 High
Boiler Fault Code F85
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F85 appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's temperature sensors are reporting conflicting information because they are detecting heat from the same spot, causing the system to stop heating for safety. (As reported on Heatline Capriz Plus)
Pick your boiler brand for the F85 fix
Source
Information for the F85 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