Tristar Phantom Button Press / Control Panel Short

Coffee maker starts brewing by itself or changes settings without input.

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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

Moisture inside touch panel, Conductive residue on keypad, Shorted keypad circuit, Faulty control PCB

How to Fix / Troubleshooting

Safety first: Unplug the unit immediately. Unexpected operation can be hazardous.

  • Dry thoroughly: If the panel was recently cleaned or exposed to steam, leave the Tristar coffee maker unplugged in a warm, dry place for 24–48 hours.
  • Clean keypad: Gently clean the keypad surface with a dry cloth to remove any sticky residue.
  • Internal inspection (advanced): Remove the control panel and inspect for moisture, corrosion, or burnt components. Clean light corrosion with isopropyl alcohol.

Warning: If phantom presses continue after drying and cleaning, replace the control panel or main PCB. Do not leave the unit plugged in unattended.

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Repair Difficulty

Hard 4/5

Required Part

Control Panel / Main Control PCB
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