How much does it cost to fix boiler error code 3P?

Typical repair cost for the boiler 3P fault is £200-450 including labour.

3P High

Boiler Fault Code 3P

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 3P 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 stopped working because the fan that clears exhaust gases is not spinning at the correct speed to keep the system safe. (As reported on Buderus 600-28C)

Pick your boiler brand for the 3P fix

Buderus 3P 1 model

Source

Information for the 3P 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