Boiler Fault Code A 05

Also written as A05 — same fault.

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

Fault code A 05 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's computer has hit a minor, temporary hiccup and has paused itself to prevent any potential issues. (As reported on Vokera Verve I 50)