What the manual says
Manufacturer manualControl panel button fault — control panel button stuck in on position
From this model's manual
Verified against the Alpha/Alpha E Tec Plus Nx installation & service manual, page 62.
DIY fix possible
Gently press and release all buttons on the control panel to see if one feels stuck.Wipe the display panel with a dry, soft cloth to ensure no debris is jamming the buttons.Restart the boiler by turning the power off and back on at the wall switch.
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Related fault codes
All 39 fault codes on the E-Tec Plus NX
Seeing a different code? Every code this model can display, in one place.