How much does it cost to fix boiler error code P29?

Typical repair cost for the boiler P29 fault is £120-200 including labour.

P29 Medium

Boiler Fault Code P29

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code P29 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble sensing the temperature of your hot water, which may cause your hot water to run cold or behave inconsistently. (As reported on Alpha Pro Tec Plus)

Pick your boiler brand for the P29 fix

Alpha P29 2 models

Source

Information for the P29 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