Keurig not brewing a full cup of coffee? That's not supposed to happen, and it's usually a sign that something is wrong.
Still, don't rush out and buy a new machine just yet. I've had the same issue, and it's perfectly possible to fix it yourself.
In this guide, I'll help you find out why your Keurig isn't producing a full cup of coffee and show you how to fix it fast.
Can’t Get A Full Cup Out Of Your Keurig? (3 Common Reasons & Fixes)
1 K cup equals 1 full cup of coffee, or at least that's how it should work. Let's have a look at a few common problems that might be giving you a smaller cup of coffee.
1. It’s Time To Clean The Water Valve
Keurig coffee makers have a plastic valve at the bottom of the reservoir. If this becomes clogged, it will stop the water flow in your device.
This usually happens when water is left in the tank too long, allowing dirt and bacteria to build up.
It can also be caused by a calcium buildup which requires a descale (I'll go through that process in a minute).
It’s easy to fix. You’ll just need a turkey baster (or a squirting syringe alternative).
2. Your Machine Needs A Descaling
Limescale and mineral deposits will naturally build up over time, particularly in areas with hard water.
These deposits can cause blockages within your Keurig machine, preventing water from flowing and brewing a full cup of coffee.
Descaling your Keurig coffee equipment is straightforward. All you need is some descaling solution or a half cup of white vinegar to make your own descaling solution.
3. You Have To Unclog The Needle
A Keurig machine has an entrance and exit needle in the brew head. These pierce the top and bottom of the K cup, and the two holes allow hot water to flow in.
The needles can easily become blocked by debris or foil from the K cup lid.
Clogged needles will stop water from flowing through the coffee machine properly and prevent it from making a full cup of coffee.
Thankfully, it's an easy issue to fix, and all you need is a paper clip. Keurig has even made a video to guide you through it.
Other Keurig Brewing-Related Issues & How To Fix Them
Keurig Not Brewing Full Cup After Descaling
Descaling can fix Keurig brewers but can sometimes prevent them from brewing coffee correctly. If you can't get a full cup of coffee after descaling, it's usually one of two things:
1. The Keurig is overheating
Your Keurig can overheat when you make too much coffee, but it can also happen after a descale. Unplug the device and leave it to cool down for 5-10 minutes. Then, test it again to see if it works.
2. The water filter needs to be replaced
The cleaning solution used during descaling can clog the water filter in your water reservoir. This can disrupt the flow of water.
You can buy a replacement (online is usually easiest) and replace it quickly.
Reach into the water tank, lift the filter out by the filter handle, detach the existing water filter, and attach the new one. Place it back in the tank afterward.
Keurig Dispensing Too Much Water
This is usually because the water reservoir is too full or placed incorrectly. Here are the troubleshooting steps to go through:
Keurig Will Only Brew Large Cup
This is usually an issue with the system or an electrical component failure. There are a few things you can do to fix it:
What’s The Deal With Keurig Cup Sizes?
A Keurig machine will brew a full cup of coffee, but you can usually choose the coffee cup size.
Cup sizes are shown in ounces on most Keurigs, and this is how many ounces of water the Keurig machine dispenses to make one cup of coffee.
The 5 different size options are:
Some Keurigs let you choose from 3 sizes, whereas others (like the Keurig B70) give you 5 options. The Keurig Duo also lets you brew a pot of coffee.
The smaller the size, the more concentrated the coffee. Most K cups are best in 6oz or 8oz sizes and will become weaker and less full-bodied when brewed in larger sizes.
It all comes down to personal preference, but your Keurig should be making coffee in the size you select.
There are a few reasons why it might not be making a full cup, but it’s usually an issue with the Keurig system or a blockage.
Questions About Keurig Not Brewing Correctly
How can you tell if your Keurig is now brewing a full cup?
You can use a measuring cup to see how much coffee your Keurig is brewing. This lets you see if you're getting the right volume when you brew coffee.
How long do Keurigs typically last?
Keurigs usually last 3-5 years if properly maintained.
Will vinegar unclog Keurig?
Yes, descaling regularly with a water and vinegar solution will help to remove limescale or other blockage in the coffee maker and let the water run as it should. It's an important part of keeping your Keurig clean.
How do I make more coffee in my Keurig?
Select a larger cup size to make more coffee in your Keurig. All Keurig models (including Keurig 2.0 models) offer up to 12oz cup sizes, and the Keurig Duo can even make a full coffee pot.
How do you fix a Keurig that won't brew?
If your Keurig machine won't brew, try resetting it. If that fails, contact customer service for expert help.
How to reset Keurig?
You can reset most Keurigs by holding the power button, 8oz, and 10oz buttons for 5 seconds.
Keurigs are well-designed, and most issues can be resolved yourself.
If it's not brewing a full cup, it's usually because it's clogged, and a small amount of cleaning and descaling should get it working again.
Hopefully, this guide has explained the most common Keurig coffee maker problems and how to fix the issue with little or no cost.
Remember, proactively cleaning and maintaining your Keurig machine is the best way to keep it running smoothly in the long run.