De’Longhi Grinder Not Working? Fixes by Model

Coffee grinder with whole beans on a wooden kitchen counter

De’Longhi grinder not working? First work out which fault you have. If the grinder runs but nothing comes out, De’Longhi’s documents point to a clogged grinder or funnel, or a grind set too fine. If it whirs loudly and will not grind, its grinder FAQ points to a foreign object caught in the burrs.

Each fix below names the model its document covers. For warning lights and anything outside the grinder, see the guide to espresso machine warning lights by model.

Table of Contents

De’Longhi Grinder Not Working? The Two Faults by Model

Each row comes from that model’s own instruction booklet or help-center page.

Model	Grinder runs, nothing comes out	Grinder will not grind, or is noisy
La Specialista Arte EC9155	The grinder may be obstructed or clogged: turn the selector to 8 and vacuum every bean out of the hopper until it is empty and clean. Contact Customer Service if it persists. Filter empty after grinding: the grinder funnel is clogged; brush the attachment area and the coffee funnel with the supplied brush.	Help center (page 9b17): foreign matter that cannot be ground. Turn the selector to 8, then vacuum the beans and particles out of the beans container.
La Specialista Maestro	No Maestro-specific fix for this fault in De’Longhi’s documents used here. Use the general steps in the next section, or contact Customer Service.	Help center (page b033): the burrs are blocked by foreign matter. Remove it and clean the burrs.
Magnifica S ECAM22110	Grind-too-fine light flashing: coffee comes too slowly or not at all. Turn the dial one click clockwise toward 7 while the grinder runs, and judge after at least 2 coffees.	The troubleshooting table has no row for a noisy grinder or a foreign object. Use the general grinder FAQ steps further down.
Magnifica Evo ECAM290	Beans ground too finely: coffee comes too slowly or not at all. Turn the dial one click toward 7 while the grinder runs; the change shows after at least 2 cups.	The booklet has no foreign-object row either. Use the same general steps.

One trap in the Magnifica Evo booklet: its alarm table and troubleshooting rows send you to a section called “8.8 Adjusting the coffee grinder”, but the section itself is numbered 11.8 in the booklet. Look for 11.8.

Grinder Runs but No Coffee Comes Out

Short answer: on La Specialista Arte, the grinder or its funnel may be clogged; on the Magnifica models, the grind is probably too fine; with pre-ground coffee, probably too much went in.

De’Longhi’s grinder FAQ says that with beans, the grind is probably too fine and the machine should show it with a message or a combination of lights, so adjust the grind. With pre-ground coffee, it says too much was probably added; its fix is in the disagreements list below.

On La Specialista Arte, if the dose falls short, turn the dose dial up; if it is already at maximum, switch on the second grinding range (“Extra grinding adjustment” in the menu). With the double filter, check that the 2X light is on.

If La Specialista will not brew and its alarm icons flash, De’Longhi’s La Specialista FAQ blames too much pressure in the group head: a clogged filter basket (open the holes with a small pin), coffee above the line in the basket, or a grind too fine for the water to push through.

For dialing in grind and dose by symptom, see espresso grind size and espresso shot troubleshooting.

One Magnifica ESAM4200 fault looks like a dead grinder but is not: coffee comes out around the service door instead of the spouts. The help center blames spout holes clogged with dry coffee dust; clean them with a toothpick, sponge or stiff kitchen brush.

The “Ground Too Fine” Error and a Loud Buzz

Short answer: run a rinse first. If water flows, coarsen the grind while it runs; if it does not, the machine may need service.

The grinder FAQ gives these steps for a loud buzzing noise with a ground-too-fine message:

Turn the machine on and fill the water tank.
Take the water filter out of the tank if your model has one.
Run a rinse cycle.
If water comes out, set a coarser grind while the grinder is running and test two or three times.
If no water comes out, the FAQ says the machine may need servicing; contact customer care.

Grinder Whirs or Is Noisy but Won’t Grind

Short answer: a stone or other hard object may have come in with the beans. De’Longhi’s grinder FAQ says small foreign objects in a bag of beans are almost inevitable, and its shorter noisy-grinder FAQ names a stone from the beans as the cause to look for.

Check the model first. The grinder FAQ says machines with an electronic grinder, naming the Maestosa and PrimaDonna Soul, should go to a Service Center. For all other models, it gives these steps:

Switch the machine off at the ON/OFF button and unplug it.
Vacuum all the beans out of the hopper.
Once you can see the grinder, look between the two burrs for the object.
If you can see it, remove it gently. Do not force it if it is stuck.
If it is hard to get out, turn the grind knob toward a coarser setting (a higher number).
If it still will not come out easily, take the machine to a Service Center.
Once it is out, add a small amount of beans and press the one-cup button to check the grinder is clear.

For jams in a standalone grinder, see coffee grinder not grinding.

Beans Light On With Beans in the Hopper

Short answer: De’Longhi’s documents only say to fill the beans container; none of the pages I read explains the alert with a full hopper.

The Magnifica S booklet pairs the beans-run-out light with one instruction: fill the beans container. The Magnifica Evo says to fill the container, then press any button to clear the alarm. On the Magnifica S, the same light also covers a clogged pre-ground funnel, so check that too if you have been using pre-ground coffee.

Where De’Longhi’s Documents Disagree

Which grind number is right. The grinder FAQ calls 3 to 5 optimal. The La Specialista Arte booklet recommends 3 to 6 for most coffees, with a factory setting of 5. The Magnifica S and Evo dials are moved toward 7 when coffee stalls. The scales differ by model, so the FAQ’s range is not universal.
Too much pre-ground coffee. The grinder FAQ says take the infuser out and clean inside. The Magnifica S light table says select a milder taste or use less pre-ground, then make the coffee again.
Owner fix or service. For the same no-grind fault, La Specialista Arte gets the selector at 8 and a vacuum, and the Maestro page says remove the object and clean the burrs. The grinder FAQ allows home removal only on non-electronic grinders, and never by force.
Clogged funnel tool. The Magnifica S booklet empties a clogged pre-ground funnel with the help of a knife. The Magnifica Evo booklet cleans it with a brush.

Keeping the Grinder From Jamming

Turn the grind dial only while the grinder is running. The Magnifica S, Magnifica Evo and La Specialista Arte booklets all say so, and De’Longhi’s common-issues FAQ for bean-to-cup machines warns that turning it otherwise risks jamming the grinder.
Skip caramelized or candied beans. The Magnifica S booklet says they can stick to the grinder and damage it; the Evo booklet adds green beans and says they can make the grinder unusable. The common-issues FAQ also warns off beans that are too oily or coated, which it says can cause permanent damage.

The cleaning routines in how to clean a coffee grinder are written for standalone grinders, not for the grinder inside a bean-to-cup machine.

When to Stop and Contact De’Longhi

Stop and hand it to a Service Center when the machine has an electronic grinder (the grinder FAQ names the Maestosa and PrimaDonna Soul), when a foreign object will not come out easily, or when the rinse test after a ground-too-fine error gives no water. On La Specialista Arte, the booklet also says burrs wear down over time and a Customer Service Center changes them. If you are weighing a replacement instead of a repair, the espresso machines under $1,000 guide includes a fully automatic pick, and the espresso grinder guide covers standalone grinders.

How This Page Was Put Together

This page is built from De’Longhi’s instruction booklets for the La Specialista Arte EC9155, Magnifica S ECAM22110 and Magnifica Evo ECAM290, four of its FAQs and three help-center pages. It is based on research, not testing: I do not own any of these machines, and the page reports what the documents say, model by model.

An iFixit Answers thread about a Magnifica that whirs without grinding has one reply, which suggests replacing the grinder; that is a last resort, not a diagnosis, so it is not used as guidance here.

What I could not establish:

Why a beans alert would show with beans in the hopper. De’Longhi’s pages that I read say only to fill the container.
Which grind number is right across models, since each family’s dial uses its own scale.
How often foreign objects or worn burrs cause these faults; I found no figures.
What the La Specialista Maestro burr-cleaning guide says. The help-center page embeds it as an interactive guide that could not be read as text.
Whether clearing a jam yourself affects the warranty. The grinder FAQ gives home-removal steps, and the Magnifica S booklet says attempting to repair or modify the machine voids the warranty, but none of the pages I read says whether following the FAQ’s steps counts as a repair.

The Verdict

Work out which fault you have first. Runs with nothing coming out: clear the grinder or funnel as your model’s booklet says, and coarsen the grind one click at a time while it runs. Whirs without grinding: unplug it and look for a stone, and stop and contact De’Longhi on electronic-grinder models, or when an object will not come out without force. More coffee guides are on the coffee and espresso hub.

Frequently Asked Questions

Why is my De’Longhi grinder running but no coffee comes out?

De’Longhi’s documents point to a grinder or funnel that is clogged, or a grind set too fine. On La Specialista Arte, turn the selector to 8 and vacuum the hopper empty. On the Magnifica S and Evo, turn the dial one click toward 7 while it grinds.

Why is my De’Longhi grinder noisy but not grinding?

A stone or other foreign object may have come in with the beans. De’Longhi’s grinder FAQ says to unplug the machine, vacuum out the beans, and gently remove the object from between the burrs. Do not force it, and take electronic-grinder models to a Service Center.

Can I change the grind setting when the grinder is not running?

No. The Magnifica S, Magnifica Evo and La Specialista Arte booklets all say to turn the dial only while the grinder is running. De’Longhi’s common-issues FAQ warns that turning it otherwise risks jamming the grinder. On the Magnifica models, judge each click after two coffees.

Why does my De’Longhi say the beans have run out when the hopper is full?

I could not find a De’Longhi explanation for that. The Magnifica S booklet says only to fill the beans container, and the Evo says to fill it and press any button to clear the alarm. On the Magnifica S, the same light also covers a clogged pre-ground funnel.

What beans should I avoid in a De’Longhi bean-to-cup machine?

The Magnifica S and Evo booklets rule out caramelized or candied beans, and the Evo adds green beans, because they can stick to the grinder and damage it. De’Longhi’s common-issues FAQ adds beans that are too oily or coated, which it says can cause permanent damage.

What does the ground-too-fine error mean on a De’Longhi?

De’Longhi’s grinder FAQ says to fill the tank, remove any water filter and run a rinse. If water comes out, set a coarser grind while the grinder runs and test two or three times. If no water comes out, the machine may need servicing by De’Longhi.

About Glenn

I'm Glenn, and I started Kitchenware Compare to cut through conflicting product reviews and help readers pick kitchen gear with confidence. I don't own or test the products I write about — these guides are built from verified-purchase reviews, manufacturer specifications, and independent testing where it exists, with the reasoning shown, not just a rating.