Boiler Fault Code 2 / P

Also written as 2P — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code 2 / P 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 shutting down because it thinks the water inside is heating up far faster than it should, which often indicates a trapped air bubble or a blockage stopping the water from moving properly. (As reported on Ideal Maximiser SE)