
To configure the water hardness on your Melitta Aroma Elegance Therm DeLuxe filter coffee machine, follow these steps. For the AromaElegance model, start by pressing and holding the DECALC/HARDNESS button for more than two seconds. The red will begin to flash. The number of flashes corresponds to the water hardness level; consult Table 1 in your user manual for the specific correlation. Briefly tap the DECALC/HARDNESS button repeatedly to cycle through the different water hardness settings until you reach your desired level. Once set, hold down the DECALC/HARDNESS button again for longer than two seconds to save your selection. For the AromaElegance DeLuxe model, press and hold the DECALC/HARDNESS button while using the M button to adjust the water hardness level, which will be displayed on the screen. Release the DECALC/HARDNESS button to save. Important notes: Water hardness adjustments cannot be made while the machine is brewing, and the selected setting will be retained even if the power cable is disconnected. Properly setting the water hardness is crucial for maintaining your Melitta machine's performance and preventing mineral buildup, ensuring optimal coffee quality.


