If your coffee machine is not pumping water, it usually means there is a blockage, airlock, or component failure within the water system. This issue can prevent the machine from dispensing coffee, hot water, or steam, and is one of the most common faults across brands like De’Longhi, Sage, Jura, Siemens, and Melitta.

In most cases, the machine is still powering on normally, but no water flows through the system, or the flow is extremely weak or inconsistent.

One of the most frequent causes is an airlock in the system. This can happen if the water tank has run dry or been removed while the machine was operating. Air becomes trapped in the pump, preventing it from drawing water through.

Another common issue is a blocked water circuit, often caused by limescale buildup. Over time, mineral deposits restrict the internal pipes, thermoblock, or valves, reducing or completely stopping water flow.

A faulty or worn pump can also be responsible. If you can hear the pump running but no water is coming out, it may not be generating enough pressure to move water through the system.

In some cases, the issue may be due to a clogged filter or inlet valve. Water filters that haven’t been replaced regularly can restrict flow, while inlet valves can become blocked with debris or scale.

Start by removing and refilling the water tank, ensuring it is seated correctly. A poorly connected tank can prevent water from entering the system.

Next, try running the hot water or steam function. This can sometimes help pull water through the system and clear minor airlocks.

If your machine uses a water filter, remove it temporarily and test the machine without it. A blocked filter is a very common and easily overlooked cause.

You should also listen to the pump. If it is completely silent, there may be an electrical or pump failure. If it is loud or buzzing but not delivering water, this usually points to an airlock or internal blockage.

The first step is to prime the pump. This can often be done by running the hot water function while gently tapping or slightly tilting the machine to help release trapped air.

If limescale is the issue, performing a full descale cycle is essential. In more severe cases, multiple descale cycles may be required to fully clear the system.

For stubborn airlocks, you may need to manually draw water through the system using a syringe or priming tool (more common on Sage and manual-style machines).

If the pump is faulty, it will usually need replacing. This is more common in older machines or those that have been run dry repeatedly.

If you have tried priming, descaling, and removing the filter with no success, the issue may be deeper within the machine. This could include a failed pump, blocked solenoid valve, or internal component failure.

At this stage, further diagnosis or repair may be required, especially for integrated or high-end machines.

Regular maintenance is key to avoiding this problem. Replacing your water filter on time and descaling your machine regularly will significantly reduce the risk of blockages.

Avoid letting the water tank run empty, as this is one of the main causes of airlocks forming in the system.

Keeping your machine clean and following the manufacturer’s maintenance schedule will ensure consistent performance and extend the lifespan of internal components.

A coffee machine that is not pumping water is usually caused by an airlock, limescale buildup, or a pump issue. Most cases can be resolved with simple steps like priming the system or descaling, but persistent problems may require part replacement or professional repair.