Cause:
The taste of burnt coffee is straightforward, either the coffee beans are over-roasted or the brewing temperature is too high. However, it can also be caused if you’re using an unsuitable coffee type that is too fine.
Solution:
Reduce the brewing temperature to prevent burning your coffee beans. For model-specific information on how to adjust the brewing temperature, please check your appliance’s instruction manual.
If the problem is still occurring, try a new coffee type that is coarser.