How much does it cost to fix boiler error code B(2)?

Typical repair cost for the boiler B(2) fault is £90-160 including labour.

B(2) High

Boiler Fault Code B(2)

Also written as B2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code B(2) appears across 2 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's pilot light is likely going out because a safety sensor has lost its connection, preventing the unit from staying lit. (As reported on Potterton Flamingo RS40 RS50)

Pick your boiler brand for the B(2) fix

Ferroli B(2) 2 models Potterton B(2) 3 models

Source

Information for the B(2) 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