Breville Restricted Water Flow / Scale Buildup

Breville coffee maker takes much longer than normal to brew a pot of coffee.

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Possible Causes

Scaled thermoblock or boiler, Clogged internal tubing, Blocked filter basket or showerhead, Dirty inlet filter

How to Fix / Troubleshooting

Safety: Hot water and steam can cause burns; allow the machine to cool before disassembly.

Steps:

  • Run a full descale cycle using Breville descaling solution.
  • Clean the showerhead or brew outlet with a brush to remove coffee oils and fines.
  • Clean or replace the paper or gold-tone filter to ensure it is not restricting flow.
  • Check and clean the water tank inlet filter.

Resolution: If brewing remains slow after descaling and cleaning, internal tubing or the thermoblock may be heavily scaled and require professional replacement.

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Repair Difficulty

Easy 2/5

Required Part

Thermoblock
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