DESCALE
Breville Scale Buildup in Hydraulic Circuit

Breville coffee maker displays DESCALE or a flashing descale icon and may reduce brewing or steaming performance.

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Possible Causes

Hard water use without filtration, Infrequent descaling, Blocked thermoblock passages, Scaled steam wand and valves

How to Fix / Troubleshooting

Safety: Follow the descaling instructions exactly. Hot acidic solution can cause burns and damage surfaces.

Descale procedure (general Breville guidance):

  • Empty the drip tray and remove any coffee grounds or pucks.
  • Fill the water tank with a mixture of Breville descaling solution and water as specified in your manual.
  • Enter DESCALE mode using the front panel buttons (varies by model).
  • Run the descale cycle through both the brew head and steam wand as instructed, collecting the solution in a large container.
  • After descaling, thoroughly rinse the tank and run at least 2 full tanks of fresh water through the system to flush out any remaining solution.

Resolution: The DESCALE message should clear automatically after the cycle. If performance is still poor, a second descale or manual cleaning of the shower screen, group head, and steam wand may be required.

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Repair Difficulty

Easy 2/5
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