Microwave keypad buttons require very hard pressing or only work intermittently.

Safety first: Disconnect power before removing the control panel.

• Step 1 – Surface cleaning: Clean the keypad surface with a soft cloth; avoid excessive moisture.
• Step 2 – Test pattern: Note which keys are affected. If entire rows or columns fail, the membrane or ribbon is likely damaged.
• Step 3 – Inspect ribbon cable: Reseat the keypad ribbon cable on the control board.
• Step 4 – Replace keypad: If issues persist, replace the membrane keypad or full control panel assembly as specified for your Bertazzoni model.