A jammed coffee grinder: stop before trying to clear it
Safe intake steps for a grinder that stalls, hums, or stops delivering grounds, without reaching into moving parts.
Do not keep pressing start
A grinder that hums without turning or repeatedly stops needs to be taken out of use. Switch it off and disconnect it from power. Do not place a hand, utensil, or improvised tool near the burrs. Never bypass a cover switch to see whether the motor will run.
Think back to the last normal operation. Did the grinder stop during a dose, immediately after an adjustment, or after cleaning? Record that sequence and the exact model. You do not need to reproduce a dangerous fault to provide useful evidence.
What an owner can clear depends on the manual
Some cleaning tasks are designed for the operator; internal disassembly is not. Follow the manufacturer’s procedure for your grinder and stop if it requires force or access beyond those instructions. Do not assume that rotating an adjustment collar in a direction shown for another model is appropriate for yours.
Keep any foreign object already found outside the machine for identification. Do not reach into the mechanism to look for one. A blockage is one possible cause of a stall, but a drive or electrical fault can also prevent rotation.
What happens at diagnosis
We examine the feed path, burr assembly, discharge area, and drive as the fault requires. The repair proposal follows those checks. It may be a cleaning or mechanical problem; we do not treat every stopped grinder as a motor replacement.
Tell us whether the grinder is a separate unit or built into the espresso machine. That determines what equipment needs collection. We arrange pickup and return for accepted equipment, and the bench deposit is separate from the approved repair.
Model-specific reading: Mazzer Mini tutorials and our MDX/Mythos intake guide.
Pickup, assessment, and return
Standard deposit: $200. Additional bench work: $150 an hour.
The deposit pays for collection, bench diagnosis, and delivery back to you. It is not a credit against the repair charge. We seek your approval for the proposed repair.
Allow up to a week for diagnosis. Most repair jobs run 3–4 weeks; confirm the status of your own machine with us.
Repair coverage: parts 6 months; labor 6 months; consumables 90 days. A return of the same repaired fault is corrected without another charge.
(925) 977-8995 · Tell us the model and the fault when you book.
Before you book
Should I put the grinder back together and test it repeatedly?
No. After the permitted operator cleaning, leave a persistent stall for assessment rather than repeating starts or opening protected parts.