What the manual says
Manufacturer manualProgramming mode entry code
From this model's manual
Verified against the Biasi Dina installation & service manual.
DIY fix possible
Check if any buttons on the control panel are stuck or being pressed down.Turn the selector dial to the 'Off/Reset' position for 30 seconds.Turn the dial back to the 'Winter' or 'Summer' setting to exit the menu.
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