Mr. Coffee Stuck Warming Plate Relay / Thermostat

Warming plate stays on or very hot even when the coffee maker is turned off.

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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

Stuck relay contacts on control PCB, Shorted thermostat, Miswired heater circuit after prior repair

How to Fix / Troubleshooting

Safety first: Unplug the coffee maker immediately. Do not continue using it in this condition due to fire risk.

  • Confirm behavior:
    • With the unit unplugged, allow it to cool completely.
    • Plug in briefly and see if the plate begins to warm even with power off; if so, unplug again.

This is an internal electrical fault. The control board or thermostat must be replaced by a qualified technician. Do not attempt to bypass or "work around" the issue.

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Repair Difficulty

Professional Required 5/5

Required Part

Control PCB Heater Relay
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