Descaling removes mineral buildup that slows water flow and weakens your brew
Descaling a Breville coffee maker with a grinder means running a cleaning solution through the water lines to dissolve calcium and mineral deposits. These deposits accumulate over time, especially in hard water areas, and they clog the heating element, slow the water flow, and make your coffee taste flat. The process takes about 15 to 20 minutes and uses a commercial descaling solution—Breville sells its own, but any food-grade descaler made for espresso machines works.
You do not need to take the machine apart. The descaling solution runs through the same path your water does, cleaning as it goes. Most Breville grinder models have a descale cycle built into the control panel, which automates the timing and tells you when to refill the water tank.
Key Takeaways
- Descale your Breville every two to four months, or more often if your water is hard—mineral buildup clogs the heating element and slows extraction.
- Use Breville descaling solution or any food-grade espresso machine descaler mixed with water at the ratio printed on the bottle.
- Empty the portafilter and basket, fill the water tank with the solution, and run the descale cycle from the control panel—the machine will prompt you when to empty the drip tray.
- After descaling, run two full tanks of fresh water through the machine to rinse out all descaling solution before making coffee.
- If your Breville has no descale button, run the solution through the group head or steam wand in short bursts, then flush with water.
What descaling solution to use
Breville sells its own descaling solution in single-use packets or bottles. One packet treats one descaling cycle. You can also use Cafiza, Dripkit, or any descaler labeled safe for espresso machines—avoid all-purpose vinegar-based cleaners, which can damage seals and leave a taste.
Mix the solution with water at the ratio printed on the package. Most commercial descalers are concentrate, so you will dilute them in the water tank. Read the label before you start, because ratios vary. If you are using Breville's own packets, each one is pre-measured for a full tank.
Step-by-step descaling for Breville machines with a descale button
First, empty the portafilter and remove any basket or filter inside it. Leave the portafilter attached to the group head. Fill the water tank with the descaling solution mixed to the correct ratio, then place a large cup or jug under the group head to catch the liquid.
Press the descale button on the control panel. The machine will heat up and begin running solution through the group head in pulses. It will pause and prompt you to empty the drip tray when it fills. Empty it, then press the button again to continue. The cycle runs until the water tank is empty.
Once the tank is empty, refill it with fresh water only—no solution. Run the entire tank through the group head using the same descale button or by running the machine normally. Repeat with a second full tank of fresh water. This rinse step is essential; any descaling solution left inside will ruin the taste of your next brew.
Descaling Breville machines without a dedicated descale button
Some older Breville models do not have an automated descale cycle. Instead, you will run the solution through manually. Fill the water tank with the diluted descaling solution, then turn the machine on and let it heat.
Place a cup under the group head. Press the brew button or lever for three to five seconds, then release. Let the machine sit for ten seconds, then repeat. Continue this pulse pattern until the water tank is empty. This mimics the descale cycle by running solution through the heating element and lines without forcing it all at once.
After the tank empties, refill with fresh water and repeat the pulse pattern twice more to rinse. The machine should be silent and steam-free before you make coffee again.
How often to descale
Descale every two to four months under normal use. If your water is hard—meaning it has high mineral content—descale every four to eight weeks. You can check your local water hardness by searching "[your city] water hardness" or asking your water utility.
Some Breville machines display a descale light when minerals build up enough to affect performance. If your machine has one, descale as soon as the light appears. Do not ignore it; running the machine with heavy mineral buildup can damage the heating element.
Signs your Breville needs descaling before the next scheduled date
Water flows slower than usual from the group head or steam wand. The machine takes longer to heat up or shuts off before reaching full temperature. Your espresso tastes sour or weak even when you use fresh beans and dial in the grind correctly. Steam pressure drops noticeably when you steam milk.
Any of these point to mineral clogging. Descale when ready rather than waiting for the next scheduled cycle. A machine that is heavily clogged may not run a full descale cycle because water cannot flow through; in that case, run the solution through in short pulses and let it soak for 15 minutes between pulses to soften the buildup.
Cleaning the grinder while you descale
Descaling the machine does not clean the grinder burrs or chute. While the machine is descaling, you can clean those separately. Remove the hopper and use a small brush or old toothbrush to sweep out any grounds stuck in the chute. For the burrs themselves, Breville sells grinder cleaning tablets (Cafiza makes them too) that you run through the grinder to dissolve oils and old grounds.
Put a cleaning tablet in the hopper, close it, and run the grinder as if grinding beans. Catch the powder that comes out in a cup or trash. Run two or three tablets through until no powder comes out. Then run a small handful of dried rice through the grinder to absorb any remaining cleaning powder, and discard that rice. Your grinder is now clean and ready to use.
What to do if descaling does not restore water flow
If you have descaled twice and water still flows slowly, the clog may be in the shower screen or group head gasket rather than deeper in the machine. Remove the shower screen (the flat piece with holes that sits under the group head) and soak it in descaling solution for 20 minutes, then scrub it with an old toothbrush and rinse thoroughly.
If flow is still slow after that, the heating element or internal lines may be severely blocked. At that point, contact Breville support or a local espresso machine repair shop. Continuing to run the machine with a serious clog can burn out the heating element, which is expensive to replace.
Frequently Asked Questions
Can I use vinegar to descale my Breville?
No. Vinegar is acidic enough to damage the rubber seals and gaskets inside the machine, and it leaves a taste that is hard to rinse out completely. Use only food-grade descaling solution made for espresso machines. Breville's own solution is formulated for the machine's materials.
How long does a descale cycle take?
A full descale cycle takes 10 to 15 minutes, plus another 10 minutes for rinsing with fresh water. Set aside 25 to 30 minutes total. Do not rush the rinsing step; leftover descaler will affect your next brew.
Do I need to descale if I use filtered water?
Filtered water reduces mineral buildup but does not eliminate it. You still need to descale every three to six months, depending on your filter quality and how much you use the machine. Filtered water just extends the time between descales.
What if water leaks from the group head during descaling?
Small drips are normal. If water sprays or pours out, the portafilter may not be seated properly. Remove it, wipe the group head gasket dry, and reattach the portafilter firmly. If leaking continues, the gasket may be worn and need replacement—contact Breville for a replacement part.
Can I descale while the grinder is running?
No. Descale the machine first, then clean the grinder separately with grinder cleaning tablets. Running descaling solution through the grinder can damage the burrs and motor. Keep descaling solution away from the grinder entirely.