Keurig Shows ‘Prime’ Error: Know How to Solve It

If your Keurig also shows the message “Prime” and you are worried about what it is then don’t worry many of us get this message on our machine that can be fixed easily.

We will guide you in this article on why Keurig shows the “Prime” message and steps to solve this issue.

The “Prime” Error on your Keurig can be formidable, However, it can be easily fixed.

The message appears when the machine is not able to pull the water from the water reservoir because of air bubbles or debris obstructing the flow of water.

Some factors by which this happens

  1. Air that is trapped in the line or pump may impede the proper flow of water.
  2. The accumulation of debris or scale can block the water intake.
  3. If the water reservoir is not properly positioned. This can result in a weak connection and inadequate water flow.

You can follow these steps to fix this and make your machine work again:

The first thing you can do is to check the water reservoir to solve the issue.

  1. Turn off your Keurig coffee maker, then remove the water reservoir from the machine.
  2. Now, inspect for any dirt or coffee grounds that could be obstructing the valve at the bottom. Completely clean the reservoir with warm, soapy water.
  3. After cleaning and drying, fix the water reservoir back in its place on the machine. Make sure it’s lined up right and snugly in place. This will guarantee a strong seal and connection.

Sometimes Air Bubbles get trapped in the system and block the water flow which can cause this “Prime” message on your Keurig coffee maker.

  1. First, fill the water reservoir with fresh water up to the maximum line and mildly shake or tap the edges of the reservoir to remove any air bubbles that may be trapped. 
  2. Now, perform several brewing cycles using only water and without a K-Cup pod. This process will help to get rid of any leftover air in the system.

Coffee grinds can block the needles and reduce the machine’s performance: 

  1. Before going ahead with the process make sure the machine is unplugged and turned off.
  2. Remove the K-Cup holder assembly and separate the funnel. Wash both parts with warm water to remove coffee grounds and debris.
  3. Utilize a paper clip or a comparable tool to carefully remove any blockages in the needles found in the K-Cup holder and the lid of the machine. Do it carefully to not damage any needle.

There are some other reasons for the “Prime” message such as sometimes the clogs or dirt buildup at the filter screen and water reservoir port. Here is a thorough guide on how to deal with this problem.

  1. Before proceeding with the process, ensure your machine is turned off and unplugged for safety.
  1. Detached the water reservoir from the Keurig coffee maker, pour any remaining water, and inspect the reservoir for any visible dirt or debris.
  1. Find the filter screen inside the water reservoir, which is a small mesh screen where water flows out of the reservoir and goes into the machine. Mildly remove any debris using a gentle brush or cloth. Do it carefully to not damage the screen. If it is extremely dirty, you can rinse it under running water to help remove any particles.
  1. Inspect the location of the machine where the water reservoir connects. This area is also called the water reservoir port. Clean the area around the port by wiping it with a damp cloth to remove any dirt or leftover coffee stains. To clean the blocked port make use of a soft brush or a toothpick, and clean it mildly to prevent any damage to the machine.
  1. After cleaning, wash the water reservoir with fresh water. Ensure that the filter screen and the port area are cleaned well and no debris remaining on it. Completely dry the parts before assembling them back.
  1. Place the water reservoir back in its place on the machine, and ensure that it is properly aligned and securely seated. Fill the fresh water in the reservoir then turn on the machine and perform several brewing cycles using only water. This process will help to clean any leftovers from the reservoir and make the system for normal use.

The water you use in your machine gradually its minerals get buildup and affects the performance of your machine as well as water flow. 

That is why it is recommended to use only filtered water in your coffee maker.

Here is a simple process to descale your Keurig coffee maker.

The Required Materials

  • white vinegar or Keurig descaling solution 
  • Large size mug
  • Freshwater


Remove the water reservoir and the filter from your Keurig machine.

Fill one-third descaling solution in the reservoir and fill the remaining part with water.


Put the mug in place, raise the handle, choose the biggest cup size, and then press Brew.

Throw away after brewing. Wait until the light stops flashing, turn it off, and wait for 30 minutes before making another drink.


Dispose of the remaining solution by dispensing it and throwing it away.

Perform three rounds of running a 12-ounce water cycle and emptying the water each time.

Final Steps

Let your Keurig machine cool

Clean the tank and put new water in it.

Complete twelve rinses using large cups.

The total time this descaling process will take is about 45 minutes

Note: If you are using vinegar then use an equal amount of water with vinegar. Check the manual for more instructions.

Brewing only with water helps to flush out any remnants of debris or solution.

  1. Ensure to fill the water reservoir with fresh water
  2. Now, perform several brewing cycles using only water and without a K-Cup pod. This process will help to get rid of any leftover debris or descaling solution in the system.

Having this “Prime” message on your Keurig can be frustrating especially when you need a fresh cup of coffee, however, this issue can be fixed easily by following all the easy steps in the article.  

To keep your machine healthy and working correctly regular maintenance and cleaning are important.

If after following all the steps correctly your issue is not resolved then check out the Keurig user manual or get in touch with Keurig customer service if you need more help.

Meet Vishu Yadav, the coffee connoisseur behind With a barista background and a love for coffee, he explores diverse coffee cultures and brewing techniques. Join him for the latest trends, specialty roast reviews, and brewing insights on

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