BoilerFaultCodesWhat the manual says
Manufacturer manualHIGH SYSTEM PRESSURE
Shared across the Murelle EV HE range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Locate a radiator in your home, preferably one upstairs.Place a cloth under the radiator bleed valve and use a radiator key to open it slightly.Release a small amount of water until the boiler pressure gauge drops to the green zone (typically 1.0 to 1.5 bar).Tighten the bleed valve firmly and check if the error clears.
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Related fault codes
All 71 fault codes on the Murelle EV HE System
Seeing a different code? Every code this model can display, in one place.