BoilerFaultCodesWhat the manual says
Manufacturer manualButton fault — verify all control buttons function; check PCB
Shared across the Murelle One 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
Check all buttons on the front panel to see if any are physically stuck in the 'pressed' position.Gently press and release every button several times to ensure they move freely.Restart the boiler using the reset button to see if the error clears.
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Related fault codes
All 30 fault codes on the Murelle One HE
Seeing a different code? Every code this model can display, in one place.