BoilerFaultCodes E61 520 High
Boiler Fault Code E61 520
Also written as E61520 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E61 520 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 is struggling to accurately read or maintain the water pressure in your heating system, which is preventing it from firing up reliably. (As reported on Ariston Excalibur)
Pick your boiler brand for the E61 520 fix
Source
Information for the E61 520 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 7 July 2026