Sub-Zero User Interface Keypad Failure

Display is lit but unresponsive; buttons do not change settings 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

Failed user interface board, Moisture intrusion behind keypad, Loose ribbon cable to main board, Control lock feature enabled

How to Fix / Troubleshooting

Safety first: Disconnect power before removing the control panel.

Step 1 – Check for control lock

  • Some Sub‑Zero models have a control lock function; consult the user manual to unlock (often by holding a specific button combination).

Step 2 – Power reset

  • Unplug the unit for 5 minutes, then restore power and test the keypad.

Step 3 – Inspect UI connections

  • Remove the control panel bezel and inspect the user interface board and ribbon cable.
  • Reseat the cable and check for corrosion or moisture.

Step 4 – Replace UI board if needed

  • If buttons remain unresponsive or random, replace the user interface board.
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Repair Difficulty

Medium 3/5

Required Part

User Interface Board
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