Breville Barista Express Grinder Not Working? Grinder, Steam and Pump Fixes

By Buyan Danzyuryun, owner of Sprocket Appliance Repair · Published September 21, 2026 · 7 min read

The Breville Barista Express (BES870XL) packs a grinder, a pump, a thermocoil and a steam wand into one box — so when it stops working, the first job is figuring out which of the four is actually at fault. A good share of what people call a broken machine turns out to be a hopper that isn't seated, a grind set too fine, or a steam tip full of dried milk. This is what to check, cheapest first, before you pay anyone to open it.

Unplug the machine before you take anything apart.

1. The grinder does nothing at all

The Barista Express will not run its grinder unless the bean hopper is locked in place — the hopper presses a small safety switch. It is the most common reason a grinder "dies" overnight.

Lift the hopper off (turn it to the unlock position first).
Brush any grounds and bean chaff away from the lock and the switch area.
Seat the hopper again and turn it until it clicks into the locked position.

Completely silent after that? The switch, the grinder motor or the control board is the likely culprit — that is a job for a technician.

2. The grinder hums or runs, but little or no coffee comes out

Here the motor is fine and the beans are not getting through. In rough order of likelihood:

Beans bridged in the hopper. Oily, dark-roast beans stick together and stop feeding. Give the hopper a shake or stir the beans.
Grind set too fine. At the finest settings, especially with oily beans, the burrs pack solid. Move a few steps coarser and try again.
Clogged burrs. Empty the hopper, remove the upper burr as your manual describes, and brush both burrs and the chute clean. Coffee oil builds up faster than people expect; a stiff brush and a vacuum do the job.

If the grind is clean and correctly set but still barely trickles out, the burrs may be worn or the drive may be slipping. Burrs and many other Barista Express parts are still sold, which is one reason this machine is usually worth repairing.

3. The steam wand is weak or not steaming

Dried milk in the tip. The single most common cause. Unscrew the tip if yours comes off, soak it, and clear the holes with the pin tool that came with the machine. Purge the wand for a second before and after every use from now on.
Scale. Steam passes through the same heating circuit as the brew water. If the wand has been getting weaker over months rather than overnight, descale — see our descaling guide.

No steam at all after a clean tip and a descale usually means a valve or the heating element — a repair.

4. No water through the group head, or it won't pull a shot

Check the tank. It must be filled and pushed fully down so the valve at the bottom opens. A tank that is a few millimetres high feeds nothing.
Try without coffee. Run water through the group head with the portafilter out. If water flows freely, the machine is fine and the puck is the problem: the grind is too fine, the dose too big, or the tamp too hard. Go coarser and try again.
Check the basket. A filter basket with blocked holes chokes the shot. Soak it and hold it up to the light.
Air in the pump. After the tank ran dry, the pump can lose its prime. Run hot water through the wand or group head for a few seconds until the flow becomes steady.

The pump runs loud but nothing comes out even without coffee in the way? That points to scale in the thermocoil, a stuck valve or a failing pump — the repair side of this list.

5. The pressure gauge sits too low or too high

On this machine the gauge mostly reports on your puck. Low pressure with a fast, pale shot means the grind is too coarse or the dose too light. Pressure pinned high with a dripping shot means the opposite. Change one thing at a time. If the needle stays wrong with a grind you know is correct, it is time for a technician.

When to call a technician

The grinder is silent with the hopper properly locked
The pump runs but no water reaches the group head, even without coffee
No steam after cleaning the tip and descaling
Water under the machine rather than just in the drip tray
A burning smell, a tripped breaker, or any sparking

We repair Breville machines across Brooklyn, Queens and Manhattan below 110th Street — see Breville repair for models and parts. Typical repairs run $150–$360. Approve the repair and the visit costs you nothing — the $100 diagnostic is credited in full — and every repair carries a 90-day warranty.

Frequently asked questions

Why does my Barista Express grinder hum but grind nothing?

The motor is running but beans are not reaching the burrs, or the burrs are packed. Usually beans are bridged in the hopper or jammed above the burrs, or old coffee oil has caked the burr set. Unplug the machine, empty the hopper, clear the throat and brush the burrs. If it still hums with nothing coming out, the burr set or the drive needs a technician.

Why does my Barista Express grinder do nothing at all?

First suspect the hopper. The grinder will not run unless the bean hopper is locked into place — it presses a safety switch. Take the hopper off, brush any grounds away from the lock, and seat it again until it clicks. Silence after that points to the switch, the motor or the control board.

Should I use vinegar to descale a Barista Express?

We wouldn't on an espresso machine. Breville sells its own descaler, and a purpose-made descaler is gentler on the seals and the thermocoil than vinegar. Follow the descale procedure in your manual and run a full rinse afterwards.

Is a Barista Express worth repairing?

Usually, yes — it is a well-built machine with parts that are still sold. Typical repairs run $150–$360. Approve the repair and the visit itself costs you nothing: the $100 diagnostic is credited in full. If the numbers don't make sense for your machine, we say so on the spot.