E37 High

Boiler Fault Code E37

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E37 appears across 4 boiler brands and 9 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 an electrical wiring issue where the power supply wires are crossed, preventing it from safely lighting the flame. (As reported on Vokera Condexa Pro)

Pick your boiler brand for the E37 fix

Ariston E37 2 models Keston E37 4 models Vokera E37 2 models Warmhaus E37 1 model

Source

Information for the E37 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