- Appliances
- Coffee machines
GROUND TOO FINE
De'Longhi GROUND TOO FINE on coffee machine: grind too fine
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
Your De'Longhi coffee machine shows GROUND TOO FINE because the grind is so fine that coffee comes out very slowly or not at all. While the grinder is running, turn the grinding dial one click clockwise, towards 7, and make at least 2 coffees.
Safety first
Stop and check this first
- Turn the dial only while the grinder is running, as De'Longhi describes, and keep fingers and objects out of the bean container while the machine is on.
Safe checks you can perform
- Turn the dial one click with the grinder running
- Brew at least 2 coffees
- Repeat until the flow is right
Leave these tasks to a qualified professional
- Do not attempt this professional task: Grinder and brewing unit check
- Do not attempt this professional task: Post repair test
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Grinder and brewing unit check
What they doDe'Longhi service checks the grind and the water flow through the brewing unit when the message remains at a coarse setting.
They must show youthe message reproduced at a coarse grind.
In writingthe cause found and any replaced part.
Post repair test
What they doThe technician brews several coffees and checks normal flow without the message.
They must show youcoffees with normal flow.
In writingthe test result and the final setting.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Turn the dial one click with the grinder running
- Who:
- you.
- How:
- start a coffee and, while the grinder is running, turn the grinding dial one click clockwise, towards number 7.
- Result that matters:
- having changed the setting by one click only, with the grinder running.
- If you turned it with the grinder stopped:
- redo it during grinding, as De'Longhi describes.
- If it is set:
- go on to brew test coffees.
- Evidence to keep:
- a note of the grind number before and after.
Evidence: Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
Brew at least 2 coffees
- Who:
- you.
- How:
- make at least 2 coffees with the new setting before judging the result.
- Result that matters:
- whether the coffee flows normally.
- If the flow is normal:
- the setting was the cause; leave the dial there.
- If it still comes out slowly:
- turn one more click and repeat.
- Evidence to keep:
- a note of how many clicks were needed.
Evidence: Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
Repeat until the flow is right
- Who:
- you.
- How:
- repeat the correction one click at a time, with 2 coffees between adjustments, until delivery is correct.
- Result that matters:
- reaching a correct flow without the message.
- If the message clears:
- solved.
- If it still flows slowly at a coarse setting:
- contact De'Longhi service.
- Evidence to keep:
- the final setting and a photo of the message if it persists.
Evidence: Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- De'Longhi
- Product type
- Coffee machines
Known code variants
- De'Longhi ground too fine
- Delonghi molienda demasiado fina
- Ground too fine adjust mill
- Ground too fine turn steam knob
- Molido demasiado fino
What it means
De'Longhi explains that this message, shown on the Magnifica S Plus as GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB, appears when the grinding is too fine and the coffee is delivered too slowly or not at all. Water does not pass well through the coffee tamped in the brewing unit and the machine detects it from the flow. It is not a fault: it is corrected by setting the grinder coarser, a little at a time, as De'Longhi instructs.
Warnings and stop conditions
- Loweditorial warning
Turn the dial only while the grinder is running, as De'Longhi describes, and keep fingers and objects out of the bean container while the machine is on.
Evidence: Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
Symptoms and causes
Probable causes · in order
- Grinding dial set too fineCommon
Coffee started dripping after changing the setting or the beans; one click coarser and two coffees later, the flow is normal.
Evidence: Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
- Adjustment still not enoughPossible
After one click and two coffees it still comes out slowly; De'Longhi asks you to repeat the correction one more click until delivery is correct.
Evidence: Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
Virtual technician
Does GROUND TOO FINE still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Magnifica S Plus: Message GROUND TOO FINE ADJUST MILL, TURN STEAM KNOB
De'Longhi · 2026 · official_doc
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