How much does it cost to fix boiler error code AP079?

Typical repair cost for the boiler AP079 fault is £100-200 including labour.

AP079 Low

Boiler Fault Code AP079

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code AP079 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 an issue with the outdoor weather sensor that tells it how much heat your home needs based on the outside temperature. (As reported on Baxi 400 Combi 2)

Pick your boiler brand for the AP079 fix

Baxi AP079 1 model

Source

Information for the AP079 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