Espresso Machine Not Pumping Water? 7 Fixes to Try
If an espresso machine is not pumping water, the most common cause is an air lock in the pump. Fill the tank, make sure it is seated properly, and run the pump with the steam or hot water valve open until water flows. Other causes are a grind that is too fine, a blocked basket or shower screen, scale buildup and a worn pump.
Key takeaways
- Check the simple things first: water in the tank, tank seated, basket not blocked.
- An air lock is the most frequent cause, especially after the tank runs dry.
- If water flows without the portafilter but not with it, the coffee is the problem.
- A loud pump with no flow after priming points to scale or a failing pump.
You press the button, the pump buzzes, and nothing comes out. It is alarming, but in most cases the machine is not broken. Work through these in order. The first three solve the large majority of cases.
Safety first: unplug the machine before opening it or removing any panels, and let it cool. Do not run a pump dry for more than about 30 seconds at a time.
1. Check the water tank
- Is there water above the minimum line?
- Is the tank pushed fully into place? Many have a valve at the bottom that only opens when seated.
- Is the intake tube sitting in the water and not kinked?
- Is a new water filter blocking flow? Filters need soaking before use; try removing it.
2. Clear an air lock
This is the most common cause, particularly after the tank has run empty, after descaling, or on a new machine. Air in the pump stops it drawing water.
- Fill the tank and seat it.
- Remove the portafilter.
- Open the steam or hot water valve fully.
- Run the pump for 20 to 30 seconds.
- Close the valve and try the group head.
- Repeat two or three times.
Some owners help it along by gently squeezing water into the intake tube with a small syringe or turkey baster.
3. Test without the portafilter
Take the portafilter out and run the pump.
- Water flows freely: the machine is fine. The coffee is the problem. Go to step 4.
- No water or a trickle: the blockage is in the machine. Go to step 5.
4. The coffee or the basket
Grind too fine or too much coffee. The pump cannot push through. Coarsen the grind and check your dose. See espresso grind size.
Blocked basket. Hold it up to the light. If you cannot see light through the holes, soak it in hot water with espresso detergent and scrub. Pressurized baskets have a single tiny exit hole that clogs easily; clear it with a pin.
5. Blocked shower screen
Coffee oils and fine grounds clog the screen behind the group head. Unscrew it, scrub both sides and clean the plate behind it. See how to clean an espresso machine.
6. Scale
Mineral buildup narrows the internal water paths and can stick valves shut. Signs include flow that has weakened gradually over months and white deposits in the tank or on the steam wand.
Descale if your machine’s manual allows it. See how to descale an espresso machine. If the machine is completely blocked, descaler cannot circulate and it may need service.
7. The pump or a valve
If everything above checks out:
- Loud, rattly pump, no flow: it may still be air-locked, or the pump is worn.
- Quiet hum, no flow: the pump may have seized.
- No sound at all: an electrical fault, a thermal fuse or a failed switch.
- A stuck solenoid valve can also block flow to the group.
Vibratory pumps are a common, inexpensive replacement part. If the machine is under warranty, contact the manufacturer before opening it.
Quick diagnosis
| Symptom | Likely cause |
|---|---|
| Pump noisy, nothing from group or wand | Air lock or tank not seated |
| Water from wand but not group | Blocked screen, stuck valve |
| Flows without portafilter, not with it | Grind too fine or clogged basket |
| Flow weakened over months | Scale |
| Pump silent | Electrical fault or failed pump |
Preventing it
- Do not let the tank run dry.
- Use suitable water. See best water for espresso machines.
- Clean the shower screen and baskets regularly.
- Descale on schedule.
Related problems: espresso machine low pressure and espresso machine not heating.
De’Longhi owners will find model-specific steps in De’Longhi espresso machine not pumping water.
Frequently asked questions
How do I fix an air lock in my espresso machine?
Fill the tank and seat it firmly. Open the steam or hot water valve fully and run the pump for 20 to 30 seconds. The open valve gives the air an easy way out so the pump can draw water. Repeat a few times if needed.
Why is my espresso machine making noise but no water comes out?
The pump is running but not moving water. It is usually an air lock or a tank that is not seated. If water flows with the portafilter removed, the coffee is ground too fine or the basket is clogged.
How do I know if my espresso machine pump is broken?
If the tank is full and seated, priming does not help, the machine has been descaled, and the pump hums weakly or is silent, the pump may have failed. Vibratory pumps are inexpensive and often replaceable.