Boiler Fault Code E83 485

Also written as E83485 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026

Fault code E83 485 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 it has become too hot and has automatically shut itself down to prevent any damage or safety hazards. (As reported on Potterton Promax 15 & 24)