BoilerFaultCodes EE1 High
Boiler Fault Code EE1
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code EE1 appears across 1 boiler brand and 2 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 a blockage or a pump failure that is stopping water from moving through the system properly. (As reported on Grant Vortex)
Pick your boiler brand for the EE1 fix
Source
Information for the EE1 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