Safety first: Unplug before accessing the warming plate.

Limit keep-warm time: Reduce the warming time setting or turn off the coffee maker once brewing is complete.
Use proper grind: Use a medium grind; avoid espresso-fine grinds in drip machines.
Descale to normalize flow: If brew time is excessively long, descale to restore normal flow and extraction.
Check warming plate thermostat (advanced): If the plate seems excessively hot (coffee boiling), the thermostat may be faulty and should be replaced.

Brewed coffee has a burnt or bitter taste even when using fresh coffee.

Possible Causes