E193 High

Boiler Fault Code E193

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E193 appears across 3 boiler brands and 38 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has sensed that water is not circulating properly before it starts the heating process, which is usually caused by an air lock or a blockage. (As reported on Potterton Promax System HE Plus)

Pick your boiler brand for the E193 fix

Baxi E193 29 models Main E193 1 model Potterton E193 8 models

Source

Information for the E193 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