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How do I set the water hardness on my Melitta Optima Timer Filter Coffee Machine?

1Answers
VanOmar
12/17/2025, 03:04:47 PM

To configure the water hardness setting on your Melitta 100801 Optima Timer Filter Coffee Machine, follow these steps: First, locate and press the "CALC" button, and keep it held down. The display will then show the pre-set water hardness value. Next, to change the water hardness level, use the "MIN" button to cycle through the options until you reach your desired setting. Finally, release the "CALC" button; the display will revert to showing the time, confirming that your selected water hardness setting has been saved. This setting will be retained even if the coffee machine is unplugged. Regularly adjusting the water hardness on your Melitta coffee machine is crucial for its performance and longevity. It helps to ensure optimal brewing and improve the flavor of your coffee by matching the setting to your local water supply.

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