How much does it cost to fix boiler error code Mains fuse F2 on PCB 40 blown?

Typical repair cost for the boiler Mains fuse F2 on PCB 40 blown fault is £180-350 including labour.

Mains fuse F2 on PCB 40 blown High

Boiler Fault Code Mains fuse F2 on PCB 40 blown

Also written as MAINSFUSEF2ONPCB40BLOWN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Mains fuse F2 on PCB 40 blown 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 power because an internal fuse has blown, likely caused by an electrical fault in the pump. (As reported on Ideal Response)

Pick your boiler brand for the Mains fuse F2 on PCB 40 blown fix

Ideal Mains fuse F2 on PCB 40 blown 1 model

Source

Information for the Mains fuse F2 on PCB 40 blown 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