Coffee Facts

De’Longhi EC155 Troubleshooting

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The De’Longhi EC155 is an excellent espresso coffee machine for making your favorite morning brews. Sometimes, however, you might experience issues while using it. Before you consider replacing it, you can troubleshoot the machine to see if you can resolve some of its functionality issues.

Confused about where to start? We compiled a list delving into common issues you might encounter with the De’Longhi EC155, possible causes, and solutions to keep it in top condition.

Why Should I Troubleshoot My De’Longhi?

Troubleshooting a De’Longhi coffee maker helps you identify the source or cause of a problem and resolve it to get the machine functioning again. Since the De’Longhi is an easy-to-use device, you can access its parts for further inspections efficiently. Consider the following De’Longhi EC155 troubleshooting solutions if you encounter any of the following issues.

Power Failure

Got a De’Longhi EC155 that won’t turn on? While some people might experience power issues due to faulty manufacturing, you might want to consider other reasons, like plugging it into an electrical outlet that doesn’t work.

Use a different outlet if the one you use won’t respond when you switch it on. You might also want to consider replacing or repairing the outlet if your counter doesn’t have others to use. 

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No Espresso Coming from the Machine

The last thing you’d want at the start of your morning is an espresso machine that doesn’t make espresso. So before declaring the unit defective and dead, consider the following reasons for it not producing coffee:

  • An empty water reservoir
  • Blocked holes in the filter holder spouts, filter, and espresso boiler
  • An incorrectly inserted hot water tank

By cleaning the clogged filter, coffee spout holes, and espresso boiler, you can increase the flow of your coffee after preparing your grounds. Filling the water tank and securing it in place can also improve your machine’s performance.

Noisy Pump

When you hear your De’Longhi EC155 making a loud noise, consider checking its water tank. It might be empty or inserted incorrectly with its bottom valve closed. To resolve this, refill the tank with water if it’s empty, or press the tank lightly to open its valve. 

Consider replacing the pump if these problems keep occurring. This solution allows you to save more money than replacing your unit. 

Cold Espresso Coffee Coming from the Machine

One problem you may experience occasionally is your De’Longhi producing cold coffee. While this problem might not be a big deal for people who enjoy an iced espresso, this inconvenience can slow your morning down and alter its taste.

Some possible causes for this issue include using the espresso mode without waiting for the indicator light or not preheating the machine or cups. To remedy this, wait for the light to flash and preheat the unit or cups before pressing any buttons. 

Light Coffee Froth

When your espresso comes out of the unit’s spout too quickly, it becomes lighter and thinner than anticipated. Most of these issues link to how you placed your ground coffee into the De’Longhi. Examples include:

  • The coffee ground not being firm enough
  • Not putting enough grounds into the machine
  • The grounds are too coarse

Increasing the amount of coffee you place in your De’Longhi EC155 darkens and thickens your coffee to match your preparation preferences. Alternatively, if you are using coarser coffee, you can press the grounds down more firmly to help your spout produce coffee more slowly while making it darker and thicker.

Dark Coffee Froth

Inversely, when the machine dispenses espresso slowly, the coffee’s froth becomes darker and denser. When troubleshooting this malfunction, consider the type of ground coffee you placed in the machine. Some possible causes for darkened froths include:

  • Adding too much coffee grounds into the machine
  • Pressing the grounds too firmly
  • A blocked filter or boiler outlet
  • The pre-ground coffee is too fine

One solution you can implement includes removing excess coffee from the machine. It would also be best to make sure the ground coffee you use is compatible with espresso machines and isn’t damp. Cleaning the espresso boiler outlet or filter can also increase the dispensing speed.

No Milk Froth

While some coffee fans don’t mind frothing milk by hand, a malfunctioning built-in frother can be inconvenient for others. Some reasons your De’Longhi espresso coffee maker might not froth milk include the milk being at the wrong temperature or a dirty frother. Cleaning the frother’s holes and using refrigerator-temperature skim milk are a couple of methods you can try when frothing again.


While no espresso maker can last forever, there are many De’Longhi EC155 troubleshooting solutions you can perform to keep your machine functioning for several years. What better way to make and enjoy your espresso or cappuccinos than with a coffee maker that suits your needs?

Check out our De’Longhi EC155 review for more insight into what makes this unit work and how you should consider adding it to your kitchen. You might find a feature that enhances your coffee-making routine. 

Happy Caffeinating!

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