Descaling removes mineral buildup inside your Breville machine that blocks water flow and damages the heating element

Descaling is a chemical cleaning that dissolves the calcium and magnesium deposits left behind by water. Over time, these minerals clog the internal passages where water travels to the group head and steam wand. A machine that is not descaled regularly will brew slower, produce weaker espresso, and eventually stop heating water properly. Breville machines typically need descaling every 40 to 80 shots, depending on your water hardness—softer water requires less frequent descaling.

The process takes about 20 minutes and uses a descaling solution designed for espresso machines. You run the solution through the group head and steam wand, then flush the machine with fresh water to remove all chemical residue. Breville machines have a built-in alert system that tells you when descaling is due, though you can also descale on a schedule if you prefer.

Key Takeaways

  • Descale your Breville machine every 40 to 80 shots or when the descaling light appears on the control panel.
  • Use only descaling solutions formulated for espresso machines—never use vinegar or general-purpose cleaners, which can damage internal seals.
  • The descaling cycle runs solution through the group head and steam wand, then you flush the machine with fresh water for at least five minutes to remove all chemical residue.
  • After descaling, run water through the machine without the portafilter attached until the water runs clear and odorless.

What you need before you start

Gather these items before you begin: a Breville-approved descaling solution (Breville sells its own brand, or you can use Cafiza or Durgol, which are formulated for espresso machines), a large empty container or sink to catch water, and fresh filtered water for the final flush. Do not use vinegar, even though it is acidic—vinegar can corrode the internal components and seals inside your machine.

Check your machine's manual or the Breville website to confirm which descaling solution is approved for your specific model. Some older Breville machines use different solutions than newer ones. If you are unsure, contact Breville customer support with your model number before you buy.

The step-by-step descaling process

Step 1: Empty the water tank and prepare the machine. Turn off your Breville machine and let it cool for at least 10 minutes. Remove the water tank and empty it completely. Fill the tank with the descaling solution mixed according to the instructions on the bottle—usually one part solution to one part water, but always follow the label.

Step 2: Run solution through the group head. Place a large container under the group head to catch the liquid. Insert the empty portafilter (without the basket) into the group head and lock it in place. Turn the machine on and let it heat. Once it reaches temperature, press the brew button and let the solution run through for about 10 seconds, then stop. Repeat this cycle—10 seconds on, 10 seconds off—until the water tank is empty. This pushes the descaling solution through all the internal passages.

Step 3: Run solution through the steam wand. After the tank is empty, refill it with the remaining descaling solution (or a fresh batch if the first one is used up). Place the container under the steam wand. Turn on the steam function and let solution flow for about 5 seconds, then stop. Repeat until the tank is empty again. This cleans the steam wand's internal channels where milk residue and minerals accumulate.

Step 4: Flush the machine with fresh water. This step is critical—any descaling solution left inside will affect the taste of your espresso and can damage seals over time. Empty the tank completely and refill it with fresh filtered water. Run water through the group head using the same 10-second on, 10-second off cycle until the tank is empty. Then refill and repeat the entire process at least one more time. You want to run at least 1.5 liters of fresh water through the machine.

Step 5: Flush the steam wand. With fresh water in the tank, turn on the steam function and let water flow through the wand for 10 seconds. Stop, then repeat until the tank is empty. Do this twice to may support all descaling solution is gone.

How to know when descaling is complete

Your Breville machine will display a descaling alert when the process is finished and the machine is ready to use again. The light or message will clear once you have run enough fresh water through the system. If the alert does not clear after you have flushed with fresh water multiple times, run one more full cycle of fresh water through both the group head and steam wand.

Before you make espresso, run water through the group head without the portafilter attached for about 30 seconds to clear any remaining residue from the shower screen. The water should run clear and have no chemical smell. If you detect any vinegar-like or chemical odor, continue flushing until it is gone.

When to descale on a schedule instead of waiting for the alert

If your Breville machine's descaling alert is not working or you prefer to descale on a fixed schedule, aim for every 40 to 80 shots. If you brew 2 to 3 shots per day, that means descaling roughly every two to four weeks. If you have very hard water (you can test this with a water hardness kit from a hardware store), descale every 40 shots. If you have soft water or use a water filter pitcher, you can stretch it to 80 shots.

Keeping a straightforward log—marking on a calendar or in a notebook each time you descale—helps you track the pattern for your specific water and machine. Over time, you will develop a sense of whether your machine needs descaling sooner or can go longer.

What happens if you skip descaling

Mineral buildup restricts water flow, so your machine takes longer to brew and the espresso tastes thin or weak because the water is not in contact with the grounds long enough. The heating element works harder to push water through the clogged passages, which shortens its lifespan. In severe cases, the machine will not heat water at all or will shut itself off as a safety measure.

Descaling is far cheaper and easier than replacing a heating element or sending the machine in for service. A bottle of descaling solution costs $8 to $15 and lasts for several descaling cycles. A heating element replacement can cost $100 to $300 plus labor.

Troubleshooting descaling problems

If water is not flowing through the group head during descaling, the machine may already be severely clogged. Let the descaling solution sit in the group head for 15 to 20 minutes without running it, then try again. The extra soak time gives the solution a chance to break down heavy mineral deposits. If water still will not flow, contact Breville support—the machine may need professional cleaning.

If you smell a chemical odor after descaling, you have not flushed enough fresh water through the system. Continue running fresh water through both the group head and steam wand until the smell is completely gone. This can take longer than expected if the machine was heavily scaled.

Frequently Asked Questions

Can I use vinegar to descale my Breville machine?

No. Vinegar is acidic but not formulated for espresso machine seals and internal components. It can corrode rubber gaskets and damage the heating element. Use only descaling solutions made for espresso machines, such as Breville's own brand, Cafiza, or Durgol.

How often should I descale if I use filtered water?

Filtered water reduces mineral content, so you can descale less often—typically every 60 to 80 shots instead of every 40. However, filtration does not remove all minerals, so descaling is still necessary. If your machine has a descaling alert, follow that instead of a fixed schedule.

What if the descaling alert does not turn off after I flush with fresh water?

Run at least one more full cycle of fresh water through the group head and steam wand. Some Breville models require a longer flush period than others. If the alert still does not clear, turn the machine off, wait 10 minutes, and turn it back on. If it persists, contact Breville support.

Do I need to remove the shower screen before descaling?

No. Leave the shower screen in place during descaling—it helps distribute the solution evenly through the group head. You can remove and soak it separately in fresh water after descaling if you want to clean it thoroughly, but it is not required.

Can I descale more often than the alert suggests?

Yes. Descaling more frequently will not harm your machine. If you have very hard water or want to maintain peak performance, descaling every 40 shots is fine. Just make sure you flush thoroughly with fresh water afterward to remove all chemical residue.