FAQ

 

Why does calcification damage my coffee machine?
Depending on local water hardness your coffee machine may become increasingly calcified over time. The limescale layer on the heating element prevents optimal heat transfer to the water, which prolongs the brewing time.

If large limescale deposits have already formed, the limescale can be removed with a suitable descaler, but residues often block the coffee machine’s flow system and cause damage.

Therefore, Melitta® recommends that you regularly descale your coffee machine.

Please note that the repair of damage caused by calcification is not covered by the guarantee.
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How do I know that my coffee machine is calcified?
- Longer flow-through time
- More steam and noise during the brewing process
- Changes in the taste of your coffee

If any of these symptoms occur with your coffee machine, we recommend descaling the machine immediately. Otherwise your machine may become blocked by limescale deposits and break down. With very severe limescale deposits the above-mentioned symptoms may persist after the first descaling process. If this is the case, we recommend you repeat the descaling process using a suitable descaler.

Household vinegar should not be used to descale coffee machines, since this often does not sufficiently remove limescale and fat deposits. It can also lead to a strong, unpleasant vinegar smell, which can affect the taste of your coffee and make it undrinkable. If products containing vinegar are repeatedly used to descale your coffee machine then this can damage the seals and make them brittle. Descaling agents based on mineral acids are also unsuitable as they can damage the pipes and tubes in your coffee machine.

For gentle and thorough cleaning we recommend descalers based on lactic acid or citric acid. Regular descaling will extend your coffee machine’s service life.

Some of our models have 3-in-1 limescale protection with programmable water hardness, a limescale indicator, and a practical descaling programme. This not only reminds you to descale your filter coffee machine, it also provides you with optimal support during the descaling process. This ensures that your filter coffee machine works perfectly.

Please note that repairing damage caused by calcification is not covered by the guarantee.
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How do I descale my filter coffee machine?
Prepare the descaling liquid in accordance with the manufacturer’s instructions and pour it into the water tank. We recommend using Melitta® Anti Calc Filter Café Machines. Switch on the appliance and follow the descaler manufacturer’s instructions. If you use an appliance without a descaling programme, turn the appliance off when the descaling liquid has run completely through the appliance.

After descaling, rinse the appliance twice with fresh water. After a brief cooling down period (about 2 minutes) fill the machine with the maximum amount of water. Turn the appliance on and allow the water to flow through completely. The turn off the appliance immediately and then repeat the rinsing process.

Some of our models have 3-in-1 limescale protection with programmable water hardness, a limescale indicator, and a practical descaling programme. This not only reminds you to descale your filter coffee machine, it also provides you with optimal support during the descaling process. This ensures that your filter coffee machine works perfectly.
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How does Melitta® support me in caring for my machine?
We want you to enjoy your machine for a long time. Therefore, a number of our filter coffee machines are equipped with 3-in-1 limescale protection. This includes setting your machine to the local water hardness level to adjust the descaling frequency to match the water hardness level in your area. When your machine is calcified an LED lights up to indicate that your filter coffee machine needs to be descaled. The practical descaling programme makes it easier for you to care for your machine and is programmed to ensure that Melitta® Anti Calc Filter Café Machines can be fully effective and keep your machine completely free of limescale.
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How often should I descale my appliance?
It is normal for hot water appliances to become calcified. Descaling is one of the essential aspects of caring for your machine to ensure it works perfectly. The frequency of descaling depends on the local water hardness. Melitta® recommends descaling regularly after every 40 brewing cycles to ensure your machine works perfectly.

Please do not use any agents that contain acetic, hydrochloric or sulphuric acid for descaling. Household vinegar should not be used to descale coffee machines, since this often does not sufficiently remove limescale and fat deposits. It can also lead to a strong, unpleasant vinegar smell, which can affect the taste of your coffee and make it undrinkable. If products containing vinegar are repeatedly used to descale your coffee machine then this can damage the seals and make them brittle. Descaling agents based on mineral acids are also unsuitable as they can damage the pipes and tubes in your coffee machine.

For gentle and thorough cleaning we recommend descalers based on lactic acid or citric acid. Regular descaling will extend your coffee machine’s service life. We recommend descaling using Melitta® Anti Calc Filter Café Machines.
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What does it mean when the CALC/DECALC button is illuminated?
The models Optima Timer, Look® Selection, Look® DeLuxe, Look® Timer, Aroma Signature, Aroma Signature DeLuxe, AromaElegance®  and AromaElegance® DeLuxe have a descaling indicator as part of their 3-in-1 limescale protection system. A continuous red light in the CALC button (Look® series of appliances,  Optima Timer) or the DECALC button (Aroma Signature series of appliances, AromaElegance® series of appliances) indicates that the appliance should be descaled. The CALC / DECALC button illuminates based on the water hardness you have set, when this button lights up you should descale promptly. The light will go out after the descaling programme has been completely carried out. Detailed information on descaling and caring for your filter coffee machine can be found in the enclosed operating instructions.
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How do I use my coffee machine’s integrated descaling programme?
Situation:

The appliance is switched off and the “CALC” button lights up. The light on the “CALC” button indicates that the appliance needs to be descaled.  
Please descale your filter coffee machine as follows:
Measure the descaler according to the manufacturer’s instructions and pour it into the water tank.
Briefly press the “CALC” button to start the descaling process.
- The “CALC” button flashes during the entire descaling process.  

The descaling process takes 25 minutes. The descaling solution needs this time to remove even stubborn limescale deposits.
- Do not turn the appliance off before the light on the “CALC” button goes out!  

Even if there is no liquid left in the water tank, the descaling programme still needs 25 minutes to complete the descaling process.  
- The light on the “CALC” button does not go out until the descaling process is complete and the appliance automatically switches off.  

The light on the “CALC” button goes out.
- Please rinse the appliance 1-2 times by allowing fresh water to run through the appliance using the normal brewing process.
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