Delonghi Espresso Machine Leaking - 5 Reasons & Fixes

Delonghi Espresso Machine Leaking – 5 Reasons & Fixes

Have you observed that your Delonghi espresso machine started leaking from the group head or from the bottom?

Well, there can be many reasons why is Delonghi espresso machine leaking. The most possible reasons are:

  • The machine gasket is broken. 
  • The water hose connection is loose or clogged. 
  • The O-ring is worn out. 
  • The boiler fitting is loose. 
  • The water pump seal has some issues. 

In this blog post, I’ll walk you through different scenarios that can cause your machine to leak. But no worries, I’ve come up with solutions, so now you can fix them at home. 

So, let’s get down to the step-by-step tutorial. 

5 Reasons Delonghi Espresso Machine Leaking

Are you wondering why your De’Longhi espresso machine is leaking? This common problem can be caused by a few things, so it’s important to identify the source of the leak and find ways to fix it. 

Let’s explore five reasons why your De’Longhi espresso machine could be leaking and provide solutions for each. 

1. Broken or Faulty Gaskets 

The most common cause of leaks in a De’Longhi espresso machine is a broken or faulty gasket.

A gasket is an important part of the espresso machine that seals off the steam wand from the boiler.

The gasket ensures that hot water doesn’t escape when you’re making an espresso shot. 

If your gasket isn’t working properly, it can cause water to leak out of the machine. To fix this issue, you’ll need to replace the gasket with a new one. 

2. Clogged Hose Connections 

Another common cause of leaks in a De’Longhi espresso machine is clogged hose connections. The hoses in your machine connect all of its parts, such as the boiler and steam wand, together. 

So they can work properly. If these hoses become clogged with coffee grounds or other debris, it can prevent them from sealing tightly and cause leaks.

You can clean out the hoses with warm water and soap to remove any blockage and stop any leaking. 

3. Worn Out O-Rings 

If your De’Longhi espresso machine has been in use for a while. The O-rings may be worn out from repeated use and no longer fit tightly together as they should. 

This can lead to leakage from your machine’s portafilter when brewing shots of espresso or steaming milk for cappuccinos and lattes. 

To fix this issue, you’ll need to replace the O-rings with new ones. Get an O-ring that fits correctly into place without any gaps or loose spots. 

4. Loose Boiler Fitting 

If your boiler fitting has become loose over time due to wear and tear or improper installation. It could be causing water leakage from within your De’Longhi espresso machine’s housing unit.

To fix this issue, you’ll need to tighten up the loose fitting using a wrench until it fits snugly into place without any gaps. So, that water could escape during the operation. 

5 Faulty Water Pump Seal

Finally, if your pump seal is damaged due to age or improper installation.

Then this too could be causing leakage within your De’Longhi espresso maker while running hot water through it during operation.

To fix this issue you’ll need a replacement pump seal. Find one that fits securely around all components within the interior housing unit.

So, that you can prevent further leakage from occurring when running hot liquid through it next time.

Watch This Video: Delonghi Espresso Machine Leaking

Why is Espresso Machine Leaking From the Bottom?

There can be a range of reasons why an espresso machine is leaking from the bottom. 

One common cause could be the buildup of minerals in the heating element. When these mineral deposits are heated.

They can cause pressure to build up and above a certain threshold, which will cause water to leak out sometimes.

Another potential reason could be that plumbing components within aren’t properly sealed like hoses, tubes, or valves. 

It’s important to identify where the leak is originating from in order to determine what needs to be done for it to stop. 

Professional maintenance may be necessary if you don’t have the tools or expertise to make any necessary repairs yourself. 

Espresso Machine Leaking From Group Head

Leaky group heads can be frustrating, but they can also produce subpar coffee results and lower-quality espresso. 

Luckily, identifying the source of this problem and fixing it doesn’t have to be an impossible feat. There are many common causes for such an issue. 

Just look thoroughly, at the integrated parts of the machine, and try to fix it yourself. Though, the group head doesn’t have any critical components, so you only need to replace them. 


Make sure to follow the above guidelines if your Delonghi espresso machine leaking issue is not solved yet. 

Check out all your machine’s components that are connected to water, trace the leakage, and understand what part has an issue.

Once you’ve got the idea, you can also contact the Delonghi customer service team, and tell them where is the issue. 

Meanwhile, if your Delonghi espresso machine leaks, you don’t have to worry at all. Apply the above steps to fix the issue.

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