Descaling for HD7805 through to HD7826, HD7840 and HD7841
When to descale
Descale the Senseo® coffee machine frequently! Preferably descale 4 to 6 times a year, but at least once every 3 months. Descaling takes about 1 hour. Do not interrupt the descaling process.
Why to descale
Scale builds up inside the appliance during use. It is essential to descale the Senseo® coffee machine at least every 3 months. Your reasons to descale:
- It prolongs the life of your Senseo® coffee machine
- It ensures maximum cup volume
- It ensures maximum coffee temperature
- The machine produces less sound during brewing
- It prevents malfunctioning
If the descaling procedure is not performed correctly, scale residue remains behind in the machine. This causes scale to build up more quickly and may cause permanent and irreparable damage to the machine.
Use the correct descaling agent
Only citric acid-based descalers are suitable for descaling the Senseo® machine. This type of descaler descales the appliance without damaging it. For the correct amount, see under ‘Descaling procedure’ below. Each descaling mixture can be used only once. After use, the descaling mixture is no longer active.
We advise you to use the special Senseo® Descaler (HD7006). Read the instructions on the package of the descaling agent.
Never use a descaling agent based on mineral acids such as sulphuric acid, hydrochloric acid, sulphamic acid and acetic acid (e.g. vinegar). These descaling agents may damage your Senseo® coffee machine.
Descaling procedure
1 – Mix 50 grams of citric acid with 1 litre of water in a measuring jug. Stir until the powder is completely dissolved.
2 – Fill the water reservoir up to the MAX indication with the descaler mixture. Then put the water reservoir back into the coffee machine.
Note: Not all Senseo® machine types have a water reservoir with a capacity of 1 litre. If you have a Senseo® machine with a smaller water reservoir, repeat steps 2 to 6 with the remainder of the mixture without filling the water reservoir up to the MAX indication.
3 – Press on/off button 
.
The machine is ready for use when the indicator light burns continuously.
4 – Place the 1-cup holder 
with a used coffee pod in it in the coffee machine. Close the lid and make sure it is properly locked.
Note: Always put a used coffee pod in the pod holder when you descale the machine. This pod serves as a ‘filter’ to prevent the sieve or hole in the pod holder from getting clogged with scale residue.
5 – Put a bowl with a capacity of at least 1500ml under the spout to collect the descaling mixture.
6 – Press the 2-cup button and let the machine operate. Repeat this until the water reservoir is empty.
Never interrupt the descaling process!
7 – Repeat steps 1 to 6. Replace the used pod with another used pod to filter out the scale residue.
Note: To descale properly, you have to use 2 litres of descaling mixture.
Never descale the Senseo® coffee machine with the lid open. Make sure the lid is properly locked.
8 – Rinse the water reservoir with tap water. Fill the water reservoir up to the MAX indication with tap water and repeat steps 3 to 6.
Note: Do not refill the water reservoir with used hot water or the used descaling mixture.
9 – Fill the water reservoir with fresh tap water up to the MAX indication again and repeat steps 3 to 6 once more.
Note: Always rinse the machine by letting it empty two full water reservoirs.
10 – Remove the used pad and clean the pod holder after descaling to prevent the sieve or hole in the centre from getting clogged.