Why Ninja Coffee Makers Leak and How to Fix It: Maintenance Tips


When your favorite coffee machine starts to leak, it’s never a good day. When it happens in the middle of the night and you have to clean up in the morning, it’s even worse.

This is true because I’ve seen it happen with my Ninja coffee maker.

Lucky for me, I went out and did my own research to find out what was causing that leak and how to fix it.

In this blog post, we’ll talk about why your Ninja coffee maker might be leaking and give you some maintenance tips that will help you avoid leaks in the future.

So the question is: why does the Ninja coffee maker leak, and how do I fix it?

If your Ninja Coffee Bar is leaking, it could be because the water reservoir connection is loose or because the water reservoir is too full. If the connection isn’t tight, it may need to be adjusted or the leak could be caused by a worn gasket. Replacing the gasket should fix the leak.

How to figure out where the leak is

One of the most important things to do first is to try to figure out what the problem is. From where does it come? Is there a particular place where the water is leaking from? Where does it come from? Is one part dry and the other wet? Are there any obvious problems with the outside that I could see?

If you answer any of these questions, you might get a better idea of what the problem is.

Now, depending on the model you have, the Ninja website has a Frequently Asked Questions (FAQ) page with answers to many of the most common problems you might have. But in my own life, I’ve had to go further to find the answer.

Look at the seal.

Most of the time, when you find a leak, it will be because the gasket has made a secure lock. Most of the time, the gasket is this rubber o-ring that sits between the opening of the reservoir valve and the opening of the coffee maker valve.

This ring keeps water from leaking out of the connection between the two compartments.

You need to use a microscope to look at this gasket in great detail. Look for tears or spots that are dry and not wet. If there is a hole in the gasket, water could leak out of this area when you are making coffee.

You should also pay attention to how the gasket looks. Can you find any parts of the gasket that are flatter than the others?

Gaskets are easy to change, and you can often find them online for a very low price.

If that’s not the problem, move on.

Check the water level.

If there is a problem with water leaking, this is probably the next place to look. It must be used with the gasket. The water is kept in the reservoir, which is the container that holds the water.

Even if the system is working fine, you may notice that it drips on a regular basis. If you see drops or dampness in this area, try this clever way to figure out if the reservoir is leaking.

Take out the water tank and dry the wet area completely with a dry towel. Then put the reservoir back in place. Give the Ninja a few hours to itself and then come back to it. Now, look to see where the pool of water is.

This method gives you more proof that the leak is coming from a certain place. If you know where the water is coming from, you can fix the problem.

You also don’t want to miss a very important part of the reservoir. That is how the reservoir is linked to the base valve. You want to make sure this link is as tight and dry as possible.

You might find some coffee grounds here, or in the worst case, a leak can cause this point to get wet over time if water is getting through them.

Look at the filter.

There may be some extra water coming out of the filter from time to time. Depending on the model you have, you may need to look in the user’s manual to find the filter.

Most Ninja coffee makers have coffee filters that can be used more than once and only need to be cleaned every 3 months. If this filter gets clogged, it could very well let water through.

I think you should set an alarm every three months to remind you to clean the filter. This will also help you see if the filter is getting clogged up and causing problems, like leaking.

Don’t worry if you see a few drops of water coming from the filter area. That makes sense. Don’t worry about small drips and splatters around the coffee filter.

If you think it’s too much, though, it could be because of the filter. And that you need to clean it up.

Check the tubes and where they connect.

Through the tubes and connectors is one of the hardest ways to check for leaks.

I’m talking about the tube that goes from the reservoir to the base of the coffee maker. Check this tube to see if your coffee maker is leaking near the bottom.

Look for any tube ends that don’t fit right. In some rare cases, you may also want to check the tube itself for cracks or holes.

Try to tighten the connection and make sure it doesn’t happen again. If you find a crack or hole in your tube, you should take it to a repair shop or call the company that made it to have it fixed. You could also take it out and take it to a hardware store to see if they have a replacement tube.

Most hardware stores have a wide range of sizes and types of rubber tubing. If you can find one that is the same size as the tube on your Ninja coffee maker, you might be able to fix the problem.

How to use a water and vinegar solution to clean the Ninja coffee maker

If you want to clean your coffee maker thoroughly but don’t want to use a chemical, try the vinegar method.

With this method, you will use a mixture of water and vinegar to clean your Ninja coffee maker from the inside out.

It’s a natural and safe way to keep your machine clean and stop it from getting clogged.

This should be done every three months.

Step 1: Combine the vinegar and water.

You will need to make a 1 to 1 solution of water and vinegar. That means the same amount of each. It is suggested that you make about a half gallon or less of this.

Step 2: Pour the solution through the coffee maker.

Put this solution in the machine’s reservoir and run it with the most coffee it can make at once.

Take out the machine’s filter so that the leftovers can move through all the tubes and drain out. Put a cup on the other side to catch the dirty mixture that comes out.

Step 3: Turn all of your mixture over and over

Do this a few times with the clean mixture, filling the cup with the used mixture each time and throwing it away. You don’t have to use all of the mixture you put together. It should be enough to do 6 cycles.

Step 4: Run water through it.

Lastly, to get rid of the vinegar smell and taste, empty the reservoir and run regular water through the machine several times to wash out any leftover mixture that might still be inside.

Step 5: Put the filter back and start making coffee.

After you’ve gone through all the cycles, put the clean filter back in and you’re ready to start drinking great coffee.

Tips and advice on how to keep your Ninja coffee machine from leaking

Keeping things clean and in good shape

It’s important to clean your coffee maker often because gunk can build up inside and cause your Ninja coffee maker to break down.

Inside the coffee maker, there could be clogs everywhere and you wouldn’t even know it. Inside the chambers, you will probably find bits of ground coffee or calcification.

If you block off places where water usually flows, the water will probably spill out.

Cleaning and unclogging these areas is important not only for keeping your coffee maker clean and working well, but also for keeping your coffee tasting great and keeping it safe.

There are often places that are hard to get to. I would suggest getting a soft-bristled toothbrush and scrubbing the places that are hard to get to.

You can also run a mixture of water and vinegar through the coffee machine to clean it.

This will make your coffee machine last longer and keep it from breaking down soon.

The filter needs to be cleaned or replaced.

Filters get dirty because water runs through this mesh that separates the coffee grounds from the coffee.

At least once every three months, the filter needs to be cleaned. It’s important to get rid of the coffee grounds and calcium deposits that build up on these filters.

If you don’t, it could stop the water from flowing, which could lead to a leak you don’t want.

Most people don’t pay much attention to this part of the machine. What I suggest is that you make a plan to remind yourself to clean it out every three months.

I use the same method of scheduling to remind myself to change my air filter, and it works PERFECTLY.


Most high-end filtering products, like a Ninja coffee maker, will come with a special solution called a descaling solution. These solutions are made with chemicals that will dissolve any mineral deposits that have built up in the water that flows through the system.

It works kind of like Draino for your coffee machine. It’s highly recommended if you don’t want to clean the device by hand and try to get into places that are hard to reach.

There are, however, ways to clean your coffee maker that don’t involve harsh chemicals, such as water and vinegar.

Don’t fill the reservoir too much.

Almost all coffee machines with water reservoirs will have a line that tells you to stop adding water at this point.

If too much water is put into the reservoir, it can overflow, letting water into the base of the coffee machine.

One last thought

I still use my Ninja coffee machine, even though it used to leak, because I found a way to fix the problem. It makes some of the best coffee ever.

Make sure you know everything that could cause it to leak or how it could leak. If you know this, you should be able to fix this Ninja machine or any other coffee machine for that matter.

I hate to keep saying this, but the key to making your machine last longer is to clean it often and take care of it properly.

If you can keep a machine for longer, you’re pretty much getting your money’s worth.

Then why?

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