37 High

Boiler Fault Code 37

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 37 appears across 9 boiler brands and 53 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because the electricity supply coming into the unit has dropped below the minimum level required to operate safely. (As reported on Alpha E-Tec Regular)

Pick your boiler brand for the 37 fix

Alpha 37 23 models Dimplex 37 2 models Ferroli 37 6 models Halstead 37 5 models Ideal 37 3 models Johnson Starley 37 1 model Remeha 37 6 models Saunier Duval 37 2 models Vokera 37 5 models

Source

Information for the 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