Mr. Coffee Over-Extraction / Overheating on Warming Plate

Coffee tastes bitter or burnt.

Possible Causes

Coffee left on hot plate too long, Warming plate thermostat stuck on high, Too fine grind or too much coffee, Dirty coffee oils on brew path

How to Fix / Troubleshooting

Safety first: Unplug and let the unit cool before cleaning the warming plate.

Limit hold time:
- Turn off the coffee maker or remove carafe from warming plate within 1–2 hours.
Adjust recipe:
- Use medium grind and avoid overpacking the filter.
Clean thoroughly:
- Wash carafe, lid, and filter basket with hot soapy water to remove old oils.
- Wipe the showerhead and brew path.

If coffee tastes burnt even when fresh, the warming plate thermostat may be overheating and should be checked by a technician.

Repair Difficulty

Easy 2/5

Required Part

Warming Plate Thermostat

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