Breville Barista Express Grinder Not Grinding? How to Unjam It and Get Beans Flowing

A Barista Express grinder problem is loud about some things and silent about others. Sometimes the motor roars but nothing reaches the portafilter; sometimes you press the button and get total silence. Those are two different faults, so the first job is to work out which one you have.

I’ve had both on my own machine over the years — a chute packed solid with oily grounds, and a hopper I hadn’t quite clicked home. Neither needed a single tool. Let’s sort yours.

First, which problem is it?

• Motor runs, but no (or barely any) grounds reach the portafilter: the grind chute is clogged. Go to Cause 1.
• Motor doesn’t run at all when you grind: a safety switch or the bean feed is the likely culprit. Go to Cause 3.
• It grinds fine but you can’t get espresso-fine grounds: burr setting or wear — Cause 5.

Cause 1 — Clogged grind chute (most common)

Why it happens: Coffee oils and fines build up in the chute that carries grounds from the burrs down to the portafilter. Oily or dark-roast beans speed this up. Eventually the chute bridges over and grounds back up instead of dropping.

The fix:

1. Remove the bean hopper and grind for a couple of seconds with no beans to clear loose grounds.
2. Switch off and unplug. Use the cleaning brush (or a dry, slim brush) to sweep out the chute and the area around the lower burr.
3. For a stubborn clog, a thin wooden skewer or the back of a cleaning brush will dislodge the packed plug. Avoid anything that could damage the burrs.
4. Refit, add beans, and run a short grind to confirm flow.

Cause 2 — Bean throat bridged or jammed

If beans aren’t even dropping into the burrs, a bean can be wedged in the throat, or a small stone or foreign object has come in with the beans. Empty the hopper, look down the throat, and clear anything bridging it. If something is stuck in the burrs themselves, see Cause 4.

Cause 3 — Hopper not locked, or bean feed closed (no motor)

Why it happens: There’s a safety interlock — the grinder won’t run unless the bean hopper is seated and locked. If it’s a hair off, you get silence. Some users also forget the bean-feed slider on machines that have one.

The fix: Lift the hopper off and refit it, twisting until it clicks firmly into the locked position. Make sure it’s sitting flat, not proud on one side. Confirm any bean-feed control is open. Then try grinding — the motor should run.

Cause 4 — Something stuck in the burrs

Why it happens: A small stone, a stray staple from a bag, or a very hard bean fragment can stall the burrs.

The fix: Switch off and unplug. Remove the hopper and the top burr (turn it to the removal position and lift it out — the manual shows the exact steps). Clear any debris from the burrs with a brush. Refit the top burr, making sure it seats and clicks at your chosen grind position.

Cause 5 — Grinds, but not fine enough (or too fine)

If the grinder works but you can’t dial in espresso, the issue is the burr setting, not a fault. The outer dial gives the main grind range; the inner/top burr has its own adjustment for the overall range. After any cleaning, the top burr must be reseated at the right position or the grind shifts. Set it back, then fine-tune with the outer dial. If, after years of daily grinding, the finest setting still feels like table salt, the burrs are worn — an inexpensive replacement and a 15-minute job.

Repair or replace?

All of the above are repair-it fixes — a brush, a reseat, or a cheap set of burrs. The grinder is one of the most serviceable parts of the machine. There’s no reason a grinder fault alone should send a Barista Express to the bin.

Stop it happening again

• Wipe the hopper and chute regularly, especially with oily beans.
• Don’t store beans in the hopper long-term — buy what you’ll use in a couple of weeks.
• Reseat the top burr correctly every time you clean it.

Keep the chute clear and the grinder will feed cleanly shot after shot.