De'Longhi Magnifica / Dinamica Ground Too Fine, Adjust Mill: brew pressure too high

Ground Too Fine, Adjust Mill means: Brew pressure too high: the grind is too fine, or the circuit is blocked.

Short answer. The pump hit its pressure limit before the shot finished. On a machine that was working, the grind has not changed; scale in the heater or infuser, or a blocked infuser outlet, is the real cause. It often pairs with "Insert Water Spout" because the machine tries to relieve pressure through the spout.

Part at faultgrinder setting / infuser outlet / water circuit

Severitylow

DIY difficultyeasy

When it appearsany

How to fix Ground Too Fine, Adjust Mill

Turn the grind dial one or two steps coarser, only while the grinder is running, and try again.
Remove and rinse the infuser; check its outlet is clear.
Run a descale cycle; this is the fix for most "ground too fine" messages on machines older than a year.
Fit the hot-water spout and run water through to confirm the circuit is clear.

When to stop and call a repairer

If hot water will not flow either, the heater or a tube inside is blocked and needs opening up.

What it costs

Parts: Descaler $10.

Service: Out-of-warranty manufacturer service for a super-automatic is typically $250 to $500 including return shipping; independent espresso repairers are usually cheaper for a single part.

Worth repairing? Yes.

FAQ

What does Ground Too Fine, Adjust Mill mean on the De'Longhi Magnifica / Dinamica?

Brew pressure too high: the grind is too fine, or the circuit is blocked. The pump hit its pressure limit before the shot finished. On a machine that was working, the grind has not changed; scale in the heater or infuser, or a blocked infuser outlet, is the real cause. It often pairs with "Insert Water Spout" because the machine tries to relieve pressure through the spout.

Can I fix Ground Too Fine, Adjust Mill myself?

DIY difficulty: easy. Turn the grind dial one or two steps coarser, only while the grinder is running, and try again. Remove and rinse the infuser; check its outlet is clear.

How much does it cost to fix Ground Too Fine, Adjust Mill?

Descaler $10. Out-of-warranty manufacturer service for a super-automatic is typically $250 to $500 including return shipping; independent espresso repairers are usually cheaper for a single part.

Is it worth repairing?

Yes.

Code meanings are compiled from manufacturer service references and repair documentation for the ECAM / ESAM; fixes follow documented repairs and owner reports. Model revisions can differ. If your appliance is under warranty, contact the manufacturer before opening it.