Bunn Keypad / Switch Input Failure

Bunn coffee maker's buttons or touchpad do not respond or respond intermittently.

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Safety Warning

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.

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Possible Causes

Worn membrane keypad, Cracked solder joints on switch board, Loose keypad ribbon cable, Moisture ingress into control panel

How to Fix / Troubleshooting

Safety: Unplug the brewer before opening the control panel.

Steps:

  • 1. Dry the panel: If the issue started after a spill or heavy steam, allow the unit to dry completely. Do not spray cleaners directly on the panel.
  • 2. Reseat ribbon cable: Open the control panel and reseat the keypad ribbon cable on the control board.
  • 3. Inspect keypad: Look for cracks, delamination, or worn button areas. Replace the keypad or switch board if damaged.
  • 4. Test switches: On models with discrete switches, test each with a multimeter and replace any that do not operate correctly.
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Repair Difficulty

Medium 3/5

Required Part

Membrane Keypad
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