MDX and Mythos grinder faults: preserve the dose evidence

Name the grinder, not just the espresso machine

An MDX and a Mythos are separate grinder platforms. A diagnosis based on the machine beside the grinder misses that distinction. Photograph the grinder’s own model label and controls, and say whether it is silent, humming, running without delivering grounds, or changing the amount it delivers.

If dosing is inconsistent, keep a few measurements from normal use rather than changing several settings at once. Record the beans and current setting. A change in output is evidence to investigate; it is not a reason to declare the burrs worn without inspection.

A jam needs a safe stop

Switch off and unplug the grinder before any operator cleaning that the manual permits. Keep hands and tools out of the burr chamber. Do not defeat a hopper or cover interlock. Humming without rotation, a burning smell, or repeated overloads should end the trial, not prompt another start.

The Mythos operating manual contains model-specific cleaning and adjustment instructions. Follow that sequence for your version. Turning a blocked adjustment mechanism with force can add a mechanical problem to the original obstruction.

At the bench

We inspect the feed path, burr assembly, discharge path, and relevant electrical controls according to the complaint. Where a dose varies, we examine how the grinder is operating before recommending burrs or another part. The repair proposal explains the findings; parts replacement begins after approval.

Let us know whether the grinder can be collected independently of the espresso machine. A separate grinder fault does not require sending the whole coffee station unless another symptom needs assessment.

Manufacturer reference

Mythos Basic and Plus manual, from Simonelli USA. Use the instructions for the exact grinder revision.