How much does it cost to fix boiler error code ALL 37?

Typical repair cost for the boiler ALL 37 fault is £100-200 including labour.

ALL 37 High

Boiler Fault Code ALL 37

Also written as ALL37 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code ALL 37 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that the electricity supply coming from your home's wall socket or fuse spur is lower than it needs to be to operate safely. (As reported on Sime Murelle Advanced HE MkII Combi)

Pick your boiler brand for the ALL 37 fix

Sime ALL 37 3 models

Source

Information for the ALL 37 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 7 July 2026