Amfa4000 Keypad / User Interface Failure

Amfa4000 display is on but buttons do not respond or respond intermittently

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Worn or damaged keypad membrane, Moisture under keypad overlay, Loose keypad ribbon cable, Faulty display/keypad module

Safety first: Disconnect power before removing the control panel cover.

1. Inspect keypad surface: Check for cracks, bubbling, or signs of water ingress on the keypad overlay.
2. Reseat ribbon cable: Open the control housing and unplug/replug the keypad ribbon cable to the main board.
3. Dry moisture: If condensation is present, gently dry the area and allow the unit to air dry fully before reassembly.
4. Test button response: Restore power and test each button. If some or all remain unresponsive, replace the keypad/display module.

Medium 3/5

Amfa4000 Display and Keypad Module

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