The numbers look right. The cup absolutely does not.

[Wok-Dough]

Machine / revision: Gaggia Classic E24 2024
Country / voltage: Canada / 120V
Grinder / burrs / setting / calibration: Eureka Mignon Specialita; stock 55 mm flat burrs; about 1.2 turns from burr touch; dial position photographed.
Basket / portafilter: stock double basket with paper filter; bottomless portafilter (58 mm system where applicable).
Bean / roast date: Honduras Marcala medium roast; roast date 2026-07-12.
Dose / yield / extraction time: 18.5 g in, 42 g out, 32 s target/current reference.
Water / temperature: soft tap water, about 45 ppm hardness; PID set to 93°C.
Exact symptom: Shot time looks normal but the cup stays sharply sour and thin.
Tests already performed: Fully preheat the portafilter, inspect the spent puck, then extend yield slightly without changing dose Already cleaned the obvious removable parts and repeated the test once.
Diagnostic photograph or video: photo of the grinder setting and a short shot video.

The numbers look respectable and the cup does not. The Gaggia Classic E24 2024 has therefore chosen to make this personal. Shot time looks normal but the cup stays sharply sour and thin.

[Wok-Dough]

Confirmed solution: I kept the dose fixed, went a little finer and extended the yield. The sour edge disappeared without changing three things at once. I am leaving the original numbers above intact so the next person can see what changed.

[Peter Masala]

The useful documented check is the revision-specific maintenance/service sequence, not a generic espresso-machine video. For Gaggia Classic E24 2024, verify the manual procedure and part number before opening or ordering anything. If the documented test does not reproduce the fault, stop treating that subsystem as proven.

[Garden In Order]

This is a good example of why the exact revision and test history matter. “My Gaggia Classic E24 2024 is bad” produces twenty theories; the measurements above at least give the theories somewhere to die.

[Garden In Order]

Short answer: Start with the simple reproducible test before buying parts.
Applies to which model/revision: Gaggia Classic E24 2024.
Likely cause: The symptom points first to a setup, wear-part or calibration issue that can be separated from a major failure.
Test to perform next: Return one variable to a known reference, repeat twice, and record whether the symptom changes in the same direction.
Expected result: If that subsystem is the cause, the symptom should change predictably rather than randomly.
Safety limit: Do not chase the shot with unsafe pressure/temperature modifications; return to stock limits if diagnosis becomes uncertain.
Evidence: First-hand owner experience with the same model/configuration; not a manufacturer diagnosis.

[Marginalia]

Not the exact revision, but I had a closely related setup with the same general failure mode. The thing that saved time was separating the Eureka Mignon Specialita / puck-prep side from the machine side instead of adjusting both together. Similar experience, not proof for your unit.

[Glitchboy]

Inference only: because the symptom is repeatable and your listed tests already rule out some obvious causes, I would suspect the narrowest remaining mechanical/setup path before a board-level failure. I would not buy a part from that inference alone.

[Author]

Posts