Nespresso Frother Blinking Red: Troubleshooting Tips and Tricks

Share with friends

Nespresso frother blinking red: Hey there! If you’re like me, you know how frustrating it can be when your milk frother suddenly stops working the way it should.

I mean, who wants a flat, boring cup of coffee, right?

Well, I recently ran into an issue with my Nespresso Milk Frother where it started flashing a red light at me.

After doing some research, I learned that this is a signal that something is wrong and needs to be fixed ASAP.

Lucky for you, I’ve gathered all the info you need to troubleshoot this problem and get back to enjoying your perfectly-frothed coffee or latte. Let’s dive in!

Why is my Nespresso frother blinking red?

There can be several reasons the Nespresso frother blinking red. Like insufficient milk to a faulty whisk.

Whatever the problem is, if it is not entirely broken, it can be fixed.

You can also learn more from the Aeroccino milk frother review.

Solution to Nespresso Frother Blinking Red

8 Reasons your Nespresso milk frother blinking red and their solutions:

Here are the 8 reasons for a Nespresso frother blinking red and their solutions:

1. Overheating of the milk frother

As a Nespresso machine specialist, I want to remind you that overusing the Aeroccino Milk Frother can cause the machine to overheat. Repeated use raises the milk temperature, triggering the machine to show a red light. If leftover milk residue is mixed with new milk, it can further contribute to the machine overheating.

How to resolve the overheating of Nespresso milk frother:

To prevent this issue, give the Nespresso machine a break and let it rest for about 15-20 minutes before continued use.

If you need to use it immediately, make sure to unplug the machine and rinse the jug, lid, and frother with cold water. Use a paper towel or a dry cloth to clean other areas.

After cleaning, let the Aeroccino dry and return to its normal temperature before using it again.

This will prevent the machine from overheating and showing a red light. It will prolong the life of your Nespresso milk frother and you can enjoy delicious frothy milk in your coffee for longer.

Due to dirty jug the aeroccino 3 can flash red light
Dirty jug can be a reason of malfunctioning

2. Dirty Aeroccino Whisk or Jug

If you notice that your Nespresso Aeroccino milk frother is flashing a warning red light, it might be due to leftover milk residue on the jug or whisk.

This residue can build up over time and create problems for the machine, requiring it to use more power to spin the milk frother, leading to malfunctioning.


You should clean the Aeroccino every time after use, especially between its walls and the base to ensure that the residue doesn’t accumulate.

You can use a non-stick scourer or a scrubbing sponge with cold water for effective cleaning. Some people also mix water and dish soap and fill it to the bottom line, then switch on the Aeroccino for safe cleaning.

Do not rush while cleaning, as sudden pressure can damage the machine’s delicate parts. Additionally, it’s crucial to avoid washing the Aeroccino 3 in the dishwasher as this can damage the machine.

3. Damaged or Missing Whisk

If the whisk is not placed correctly or is missing, the Nespresso machine will display a red light warning. A damaged or cracked whisk can also create problems for the machine’s functionality.

Using milk that requires more energy to froth than what the Aeroccino is designed for, such as oat milk, can cause the magnetic whisk to break.

Continuing to use a damaged or cracked whisk can cause the machine to continue flashing the red light warning.


After cleaning, always check that the whisk is properly positioned. If the whisk is damaged or cracked, replace it immediately.

To avoid breaking the whisk, use milk that is suitable for the Aeroccino. You can refer to the user manual for recommended milk types.

If you continue to experience issues with the whisk even after replacing it and using suitable milk, contact Nespresso customer support for further assistance.

Nespresso milk frother can flash red light if the milk whisker is faulty
A faulty milk whisker can cause the flashing red light

4. Weak Power Supply

If you are using an extension cord to plug in your Nespresso machine, it can cause a weak power supply which can lead to the machine not working properly. This can also cause the Nespresso frother to blink red.

Another cause of weak power supply is a loose connection between the whisk and the jug. This can also result in the same problem.


To avoid a weak power supply, it is best to directly plug the machine into the outlet instead of using an extension cord. If you must use an extension cord, make sure it is positioned close to the outlet.

Check the connection between the whisk and the jug to make sure it is secure. A loose connection can lead to weak power supply and cause the machine to malfunction.

5. Incorrect Milk Level

If the milk level is not correctly set, the Nespresso Aeroccino milk frother may malfunction, which is often caused by a lack of liquid in the frother.

For optimal frothy milk and lattes, set the milk level to a lower MAX level, and increase it to a higher MAX level for coffee. However, exceeding these limits can cause the Nespresso machine not to heat up correctly, leading to the blinking red light.


Make sure to pay attention to the fill levels when using the Aeroccino milk frother. It is essential to fill it to the bottom line when using the coil on the whisk. Without the coil, you have the option to fill it to either the bottom or top line, depending on your preference.

6. Damaged Thermocouple

A faulty or damaged thermocouple measuring the temperature of frothed milk can lead to wrong signals being sent to your Nespresso machine, causing it to stop operating and displaying the red light. Overuse can cause the thermocouple to wear out, resulting in incorrect readings and malfunctioning.


If your thermocouple is reading below 25 mv, it needs to be replaced. The process for removing thermocouples varies depending on the type of Nespresso machine you have.

When repairing the thermocouple, it’s essential to keep an accurate distance between the thermocouple and the flame. Also, ensure that the new thermocouple tip is corrosive and has a smooth surface. It’s best to consult with an expert for this type of repair work.

7. Mishandled electric parts

Mishandling the electric parts of the Nespresso machine can cause malfunctions and result in the blinking red light. Specifically, washing some parts of the machine with water or dropping it can damage the motor and affect the machine’s functionality. Grease or muck in the machine can also cause the machine to malfunction.


To avoid mishandling the machine’s electric parts, keep them dry and handle them with care.

Check if the milk jug or magnetic whisk attachment is cleaned correctly and connected to the base, as it is the power hub for the frother to function correctly.

Keep an eye on the base plastic to ensure it isn’t damaged or melted. If the motor is damaged due to mishandling, you can clean it properly and remove the gunk to fix it.

However, if the motor still isn’t functioning correctly, you’ll need to replace it with a new one.

Damaged base of the Aeroccino can be a reason for blinking red light and malfunctioning
Damaged base of the Aeroccino can be a reason for blinking red light

8. Not the correct type of milk

Improper use of milk can cause issues with your Nespresso frother. Using the wrong type of milk or using too much milk can lead to problems with the machine’s functionality. Overfilling the jug with milk can prevent the machine from frothing properly.


To avoid these issues, make sure to fill the jug with the appropriate amount of milk, up to the maximum limit indicated. Additionally, choose a type of milk that is high in fat and has a thicker consistency, such as oat milk, cashew milk, goat milk, or whole milk. This will ensure that your Nespresso frother operates correctly and produces quality frothed milk.

Conclusion: Why is my Nespresso frother blinking red?

A Nespresso frother blinking red can be caused by a variety of issues, including low milk levels, overheating, clogged frother, or malfunctioning frother.

By following the troubleshooting steps we’ve outlined above, you can potentially resolve the issue and get back to enjoying your favorite milk-based drinks.

If the problem persists, don’t hesitate to contact Nespresso support for further assistance. We hope this article has been helpful, and we wish you the best of luck in troubleshooting your Nespresso frother.

1. How does the Aeroccino milk frother work?

The Aeroccino uses a spinning whisk to froth up the milk, heating it up at the same time.

2. Can I use non-dairy milk with the Aeroccino?

Yes, you can. However, different types of non-dairy milk may froth differently, so it’s best to experiment to find the right one for you.

3. Can I froth cold milk with the Aeroccino?

Yes, the Aeroccino can froth both cold and hot milk.

4. Can I store leftover frothed milk in the Aeroccino?

It is not recommended to store frothed milk in the Aeroccino, as it may affect the performance of the device.

5. Can I clean the Aeroccino in the dishwasher?

Yes, the Aeroccino is dishwasher safe, except for the base.

6. How long does it take to froth and heat up the milk with the Aeroccino?

It takes about 1-2 minutes to froth up and heat up the milk with the Aeroccino.

7. Can I use the Aeroccino with any type of Nespresso machine?

Yes, the Aeroccino can be used with any type of Nespresso machine, as well as other coffee makers and devices.

8. What is the capacity of the Aeroccino?

The Aeroccino has a maximum capacity of 8.5 ounces (250 ml) for frothing milk and 13.5 ounces (400 ml) for heating milk.

9. Why is my Aeroccino not frothing properly?

There could be several reasons why your Aeroccino is not frothing properly, such as using too much milk or not cleaning the device properly.

10. How often should I clean my Aeroccino?

It is recommended to clean the Aeroccino after each use, to maintain its performance and prevent any damage or malfunctions.

Leave a Reply

Your email address will not be published. Required fields are marked *