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 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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