Descaling removes mineral buildup that slows water flow and weakens your brew
Descaling is the process of running a cleaning solution through your Breville coffee maker to dissolve calcium and mineral deposits left behind by tap water. Over time, these deposits accumulate inside the heating element and water lines, making your machine heat more slowly, dispense water unevenly, and produce weaker coffee. Most Breville machines need descaling every one to three months, depending on your water hardness—if you have hard water, descale monthly.
The descaling process itself takes about 15 to 20 minutes and uses either a commercial descaling solution made for coffee machines or white vinegar. Breville sells its own descaling liquid, but any food-grade descaling solution designed for espresso or drip machines works. The steps are nearly identical across Breville's range: fill the water tank, run the solution through the group head or portafilter, let it sit, then flush the system with fresh water.
Key Takeaways
- Descale your Breville machine every one to three months using a commercial descaling solution or white vinegar mixed with water.
- Empty the water tank, fill it with descaling solution, and run it through the group head or brew basket in short bursts, letting the solution soak between runs.
- After descaling, refill the tank with fresh water and run several full tanks through the machine to rinse away all cleaning solution.
- If your machine has a backflush function, use it during the rinse cycle to clear the group head completely.
- Ignoring descaling will eventually trigger a warning light and can damage the heating element, shortening your machine's lifespan.
What you need before you start
Gather these items before you begin: your Breville machine, a descaling solution (Breville's own brand, Cafiza, or white vinegar diluted 1:1 with water), a large empty container or sink to catch runoff, and fresh water for rinsing. Check your machine's manual to see if it recommends a specific descaling product—some Breville models have sensors that detect certain solutions and adjust the cycle automatically.
If you are using white vinegar instead of commercial descaling solution, mix equal parts white vinegar and water. Vinegar works, but it smells strong and can leave a faint taste if you do not rinse thoroughly. Commercial descaling solutions are gentler on the machine and rinse out faster, so they are worth the small cost if you descale regularly.
Step-by-step descaling for group head machines
If you own a Breville espresso machine with a group head (the part where you lock in the portafilter), follow this process. First, turn off and unplug the machine, then let it cool for 10 minutes. Empty the water tank completely and refill it with your descaling solution.
Plug the machine back in and let it heat for 30 seconds. Place your empty container under the group head, then turn the brew switch on for 5 to 10 seconds to let solution flow out. Turn it off and wait 10 seconds. Repeat this cycle—5 to 10 seconds on, 10 seconds off—for about 5 minutes, until roughly half the solution has run through. Then turn the machine off and let the remaining solution sit in the group head and lines for 10 minutes. This soak time is when the descaling solution breaks down mineral deposits.
After the soak, turn the machine back on and continue the 5-seconds-on, 10-seconds-off cycle until the tank is empty. Now empty the tank, rinse it thoroughly, and refill it with fresh water. Run the fresh water through the group head using the same cycle until the water runs clear and smells like water, not vinegar or cleaning solution. This usually takes two to three full tanks.
Step-by-step descaling for drip and single-serve machines
Breville's drip and single-serve machines (like the Oracle Touch or Barista Express Impress) descale differently because they do not have a group head. Empty the water tank and fill it with descaling solution. Place a large container under the brew basket or outlet to catch the solution.
Turn on the machine and start a brew cycle as if you were making coffee, but do not insert a cup or pod. Let the solution run for about 5 seconds, then stop the cycle. Wait 10 minutes to let the solution soak in the heating element and lines. Repeat this cycle—5 seconds of flow, 10-minute soak—until the tank is empty.
Once the tank is empty, refill it with fresh water and run full brew cycles until the water runs clear and has no smell. This usually takes two to three tanks. Some Breville drip machines have a dedicated descale button that automates this process—check your manual to see if yours does.
Rinsing thoroughly to avoid taste problems
Rinsing is the step most people rush, and it is the reason their next few cups taste like vinegar or chemicals. After you have run all the descaling solution through, do not stop at one tank of fresh water. Run at least two more full tanks of fresh water through the machine, discarding the output each time. If you used vinegar, run a third tank through.
The easiest way to know you are done is to smell the water coming out. If it smells like anything other than water, keep rinsing. If your machine has a backflush function (a button that reverses water flow through the group head), use it during the final rinse cycle to push any remaining solution out of the lines.
When your machine shows a descaling warning
Many newer Breville machines have a descaling indicator light that turns on when mineral buildup reaches a certain level. This light does not mean your machine is broken—it means the internal sensor has detected deposits. Descale as soon as you see this light; ignoring it can cause the heating element to overheat or the pump to work harder and fail sooner.
If the light stays on after you have descaled and rinsed thoroughly, the sensor may need to be reset. Check your manual for the reset procedure—on some models, you hold a button for a few seconds; on others, you run a specific cycle. If the light comes back on within a week or two of descaling, your water is very hard and you may need to descale more frequently or consider using filtered water.
How often to descale based on your water
Hard water (water with high calcium and magnesium content) requires more frequent descaling. If you live in an area with hard water—you can check your local water report online or ask your water utility—descale every month. Soft water areas can usually go two to three months between descales.
One straightforward test: if your machine is heating slowly, the water is coming out unevenly, or your coffee tastes weaker than usual, descale even if you have not hit your usual schedule. These are signs that mineral buildup is already affecting performance. Using filtered water in your machine slows mineral buildup and can extend the time between descales, though it does not eliminate the need for them.
Frequently Asked Questions
Can I use regular white vinegar instead of Breville descaling solution?
Yes, white vinegar works, but dilute it 1:1 with water first. It is cheaper than commercial solutions, but it smells strong and requires extra rinsing to remove the smell completely. If you use vinegar, run at least three full tanks of fresh water through the machine afterward. Commercial descaling solutions rinse faster and smell less, so they are easier to use if you descale regularly.
What happens if I do not descale my Breville machine?
Mineral deposits will accumulate inside the heating element and water lines, slowing heat-up time, reducing water pressure, and weakening the flavor of your coffee. Eventually, the buildup can cause the heating element to overheat or the pump to fail, which is expensive to repair. Descaling every one to three months prevents this damage and keeps your machine running at full strength.
How long does descaling take?
The entire process, including rinsing, takes about 15 to 20 minutes. The actual descaling cycle is about 5 minutes, but you need to let the solution soak for 10 minutes and then run multiple tanks of fresh water through to rinse. Plan for a time when you do not need coffee when ready.
Will descaling remove the warning light?
Usually, yes—the light turns off once you have completed the descale cycle and the sensor detects that mineral buildup has been removed. If the light stays on after descaling and rinsing, check your manual for a reset procedure. Some machines require you to hold a button or run a specific cycle to clear the sensor.
Can I descale while the machine is still hot?
No. Always turn off and unplug the machine, then wait at least 10 minutes for it to cool before you start descaling. Hot water can cause the descaling solution to work too fast and potentially damage seals inside the machine. Cooling also makes it safer to handle the group head or brew basket.