Safety first: Normal operation is safe; unplug before cleaning.

Reduce keep-warm time: Turn off the warming plate sooner or use a lower keep-warm setting if available.
Adjust grind and dose: Use a slightly coarser grind and ensure you are not overfilling the filter basket.
Clean thoroughly: Wash the carafe, filter basket, and shower head regularly to remove rancid coffee oils.
Service if overheating: If coffee tastes burnt even when fresh, the thermostat or temperature control may be faulty and should be checked by a technician.

Coffee tastes bitter or burnt.

Possible Causes