How much does it cost to fix boiler error code 4P?

Typical repair cost for the boiler 4P fault is £90-180 including labour.

4P High

Boiler Fault Code 4P

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 4P 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 lost its connection to an internal safety sensor and has shut down as a precaution to prevent damage. (As reported on Ideal Maximiser SE)

Pick your boiler brand for the 4P fix

Ideal 4P 1 model

Source

Information for the 4P 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 27 April 2026