What the manual says
Manufacturer manualControl panel button fault — button stuck in on position
From this model's manual
Verified against the Alpha E Tec S installation & service manual, page 49.
DIY fix possible
Gently press and release each button on the control panel to see if any feel physically stuck or recessed.Wipe the control panel with a dry, soft cloth to remove any dirt or sticky residue that might be holding a button down.Switch the boiler off at the fused spur switch for 30 seconds and turn it back on to reset the electronics.
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