Troubleshooting-Gaggia-Unica-Grinder

The grinder may be blocked. This typically happens if beans are being used that are not compatible with the machine. This machine does not accept oily, caramelized, or flavored beans. Use of these beans can cause permanent damage to the machine that is not covered under warranty. These beans can be identified easily. They will be shiny and feel slippery or sticky. Dry beans that are appropriate for the machine will look dull and feel rough.

1. Do the cleaning and calibration instructions in this video:
2. After reassembling the machine according to these instructions do not add beans in. First make sure the grinder adjustment knob is set to the coarsest setting, which is the largest dot.
3. Add beans back into the machine. The beans must be dry, do not add oily beans back into the unit.
4. If this clears the alarm light and shots are pulling successfully on this grind setting then you can move the grind back to the original setting. Only move the knob one dot at a time, brewing a shot in between each adjustment.

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How To Clean and Calibrate a Gaggia Unica Grinder