Boiler Fault Code 7 / A

Also written as 7A — same fault.

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

Fault code 7 / A 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's internal computer has developed a fault and can no longer safely manage the heating or hot water functions. (As reported on Ideal Maximiser SE)