How much does it cost to fix boiler error code AP?

Typical repair cost for the boiler AP fault is £0 including labour.

AP Low

Boiler Fault Code AP

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code AP 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 simply running a routine cycle to clear air bubbles out of the system and is not actually at fault. (As reported on ECA Proteus Premix 24 HCH)

Pick your boiler brand for the AP fix

ECA AP 1 model

Source

Information for the AP 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