Keurig K550 Brewing System Instruction Manual

ACID

CITRIC

4

Before you begin, you will need a large ceramic mug, fresh water,  
Keurig

™

 Descaling Solution and access to a sink. Do not use a paper cup.

STEP 1: FIRST DESCALING SOLUTION RINSE

•  Turn on your brewer.
•  Press the PRESS TO OPEN Button but do not add a K-Cup

®

 pack.

 Immediately 

lower Handle to open the Water Tank Lid.

•  Pour one third (4.6 oz.) of Keurig

™

 Descaling Solution into the Water Tank  and 

add fresh water to the FILL LEVEL Indicator. Close the Water Tank Lid.

•  Place a large ceramic mug on the Drip Tray Plate. Do not use a paper cup.
•  Press the BREW Button.
•  Discard the hot contents into sink.

STEP 2: SECOND DESCALING SOLUTION RINSE

•  Repeat bullets 1 through 5 above.
•  After pressing the BREW Button, just after the brewer starts to dispense, 

press the Power Button to turn the brewer off. Allow the brewer to sit for at 

least 30 minutes. 

•  After 30 minutes have passed, place the mug on the Drip Tray Plate and press 

the BREW Button without turning on the brewer. Do not add a K-Cup

®

 pack.

•  Discard the hot contents into sink.
•  If you can still see scale in the Water Tank, repeat Step 2.

STEP 3: FRESH WATER RINSE

•  Repeat Step 1 (three times) substituting the Descaling Solution for 8 oz. of 

fresh water each time.

•  You may need to perform additional Fresh Water Rinse cycles if you notice any 

residual taste.
NOTE: The cleaning action of the Keurig

™

 Descaling Solution may result in  

a foam dispensed from the brewer. This is natural, as the solution is reacting 

with the scale inside. For a brewer that is heavily scaled, the brewer may 

not fill properly after the descaler is added. If this occurs, you may see only  

a small or no output dispensed followed by the sound of air blowing out.  

If this occurs:

•  Turn off and unplug the brewer.
•  Plug the brewer back in, power on, and repeat the Step 3 Fresh Water Rinse 

cycle. The brewer should begin to function normally as the solution is rinsed 

out and the scale is removed. If problem persists, allow the brewer to sit 

unplugged for at least 30 minutes before continuing with the rinse. 

For more information on Keurig

™ 

Descaling Solution or to purchase please  

visit  

Before you begin, you will need a 10 oz. ceramic mug, at least  8 oz. of liquid 

Citric Acid (if you are using a powder based cleaner, mix according to the 

manufacturer’s instructions) and access to a sink. Do not use a paper cup.

STEP 1: 

•  Fill the Water Tank with 8 oz. of liquid Citric Acid up to the FILL LEVEL Indicator, 

place a ceramic mug on the Drip Tray.

STEP 2: 

•  Close the Lid, and perform a brew into the ceramic mug without adding a 

K-Cup

®

 pack.

STEP 3: 

•  Pour the contents of the ceramic mug into the Water Tank and close the Lid. 

NOTE: The contents of the ceramic mug will be hot. 

STEP 4: 

•  Start a brew but power off the brewer just after it starts to dispense and then 

allow it to sit for at least 30 minutes.

STEP 5: 

•  After the prescribed period of time, perform a brew but do not add a  

K-Cup

®

 pack. 

STEP 6: 

•  Discard the hot contents into sink.

STEP 7: 

•  Fill the Water Tank with 8 oz. of bottled water and close the Lid. Place a mug 

on the Drip Tray and perform a brew. Do not add a K-Cup

®

 pack.

STEP 8: 

•  Repeat Step 6 three times using bottled water to cleanse the brewer 

plumbing and get rid of any residual taste from the Citric Acid. Do not add a 
K-Cup

®

 pack. 

The brewer is now ready for normal use.

SELECT A DIFFERENT BREWER MODEL