Start with the simplest checks first
Most espresso machines that stop working are actually fine—they just need power, water, or a reset. Before you assume something is broken inside, check that the machine is plugged in and switched on at the wall outlet. If it has a power button on the front, make sure it is pressed. Look for a small light on the machine itself; if there is no light at all, the outlet may be dead or the power cord may be loose where it connects to the machine.
Next, check the water reservoir or line. If your machine draws water from a tank, make sure it is filled above the minimum line. If it connects to your home water line, turn on the water supply valve behind or under the machine—many people accidentally close this valve during cleaning and forget to reopen it. Run water through the group head (the part where you insert the portafilter) without the portafilter attached. If nothing comes out, the water supply is the problem.
Key Takeaways
- Check power at the outlet, the power button, and the water supply valve before assuming the machine is broken.
- A blocked group head or portafilter screen is the most common reason espresso machines stop dispensing water, and you can clear it yourself with hot water and a brush.
- If the pump runs but no water comes out, the machine may need descaling to remove mineral buildup inside the internal lines.
- Pressure gauge needles that do not move, or machines that leak water from the group head, usually mean internal seals or valves need professional replacement.
Clear a blocked group head or portafilter
The group head is the metal part on the front of the machine where you lock in the portafilter (the handle with the basket). If water will not flow through it, coffee grounds or mineral deposits are blocking the opening. Remove the portafilter and look up into the group head with a flashlight. You may see a small hole or several holes clogged with dark material.
Run hot water through the group head for 10 to 15 seconds without the portafilter attached. This often clears light blockages. If water still will not flow, use a small brass brush or an old toothbrush to gently scrub the inside of the group head while running hot water through it. Do not use a metal pick or anything sharp—you can scratch the internal seal. If the portafilter itself is blocked, soak it in hot water for 15 minutes, then brush the basket and the underside of the shower screen (the flat part with holes that sits inside the group head).
Descale the machine if water flows slowly or not at all
If the group head is clear but water still will not flow, or flows very slowly, mineral buildup inside the machine is the culprit. This happens because tap water contains minerals that accumulate in the internal lines and valves over time. You fix this by descaling—running a special acid solution through the machine to dissolve the deposits.
Buy a descaling powder or liquid made for espresso machines (brands like Cafiza, Durgol, and Dezcal are common). Follow the instructions on the package, which usually tell you to mix the solution with water in the reservoir, run it through the group head into a cup, let it sit for 10 to 15 minutes, then run it through again. After you finish, empty the reservoir, refill it with fresh water only, and run water through the group head for another minute to rinse out all the descaling solution. Do this every two to three months if you have hard water, or every four to six months if you have soft water.
Check the pressure gauge and pump noise
If your machine has a pressure gauge (a dial on the front), turn on the machine and listen for a humming or buzzing sound. This is the pump running. Watch the gauge needle—it should move toward the right as pressure builds. If the pump is running but the needle does not move at all, or if the needle moves but no water comes out of the group head, the pump may be failing or an internal valve is stuck.
If the pump is not running at all—you hear no sound when you turn the machine on—the pump motor itself may have failed. If the pump runs but the gauge stays at zero and no water flows, descaling may help, but if descaling does not work within a few hours, the machine likely needs a professional repair. Do not run the pump for more than 10 to 15 seconds at a time without water flowing through it, because the pump can overheat and fail faster.
Look for leaks around the group head or seals
Water leaking from where the portafilter locks into the group head usually means the group head seal (a rubber ring inside) has worn out or is dirty. Remove the portafilter and look at the rubber gasket—the ring that sits inside the group head. If it looks hard, cracked, or flattened, it needs to be replaced. You can buy replacement gaskets online for most machines; they cost between $5 and $20 and take 30 seconds to swap out. straightforward pull out the old one and press the new one into the groove.
If the gasket looks fine but water still leaks, the group head itself may have a crack, or the internal valve that controls water flow may be stuck open. These are not repairs you can do yourself—you will need to contact the machine manufacturer or a local espresso machine repair shop. Water leaking from the bottom of the machine or from the sides usually means a line has cracked or a fitting has loosened; check all visible hoses and connections first, tighten any that are loose, and if that does not stop the leak, the machine needs professional service.
When to call a professional repair technician
If you have checked the power, water supply, and group head, and the machine still will not work after descaling, it is time to call a repair shop. Espresso machines have internal pumps, solenoid valves, and heating elements that require special tools and knowledge to replace safely. A professional can diagnose whether the pump has failed, whether a valve is stuck, or whether the heating element is broken—all things that are not safe or practical to fix at home.
Before you call, write down the machine brand and model (usually on a sticker on the back or bottom), and describe exactly what is happening: Does the pump run? Does water come out at all? Is there a leak? This information helps the technician decide whether they can fix it in your home or need to take the machine to their shop. Repair costs vary widely depending on what is broken, but a heating element or pump replacement typically costs between $100 and $300 in labor plus parts.
Frequently Asked Questions
Why does my espresso machine make a loud noise but no water comes out?
The pump is running but something is blocking the water path. First, check that the water reservoir is full or the water line is turned on. Then descale the machine—mineral buildup inside the lines is the most common cause. If descaling does not work, an internal valve may be stuck and the machine needs professional service.
Can I use vinegar to descale my espresso machine?
No. Vinegar can damage the internal seals and leave a smell that is hard to remove. Use only a descaling solution made for espresso machines. These are formulated to dissolve mineral deposits without harming rubber seals or metal parts.
My espresso machine turns on but the group head is cold. What is wrong?
The heating element may have failed, or the machine may not have warmed up yet. Most espresso machines take 10 to 20 minutes to reach full temperature after you turn them on. If the group head is still cold after 30 minutes, or if it was warm before and suddenly went cold, the heating element likely needs replacement—contact a repair technician.
Is it safe to run my espresso machine if it is leaking?
A small drip from the portafilter connection is usually just a worn gasket and is safe to ignore until you replace it. But if water is leaking from the bottom, the sides, or the power cord area, turn off the machine and unplug it. Water near electrical parts is a shock hazard. Do not use the machine again until a professional has checked it.
How often should I clean my espresso machine to prevent problems?
Run hot water through the group head for 10 seconds before and after each use to flush out old grounds. Once a week, soak the portafilter and basket in hot water with a cleaning powder like Cafiza for 15 minutes, then brush them clean. Descale the whole machine every two to six months depending on your water hardness. These steps prevent most blockages and buildup.