Introduction

There seems to be an issue with the Keurig Single Serve Coffeemaker Brewing System. After a while it appears as if scale build-up or other contaminants prevent the Keurig from brewing full 12oz. It takes longer to brew, the Keurig becomes louder and it dispense on the average 4oz or less. This is a "quick and dirty" guide only to assist in fixing this. The Keurig for this guide came from a workshop and is used quite frequently under less than optimal conditions.

Parts

No parts required.

Keurig K40 not brewing/dispensing 12oz Open the Keurig all the way to remove the K-cup Holder The K-cup holder simply pulls straight up. There might be a bit of resistance from some spring clips. The flaky debris is actually coffee from reusable K-cup filters.
  • Keurig K40 not brewing/dispensing 12oz

  • Open the Keurig all the way to remove the K-cup Holder

  • The K-cup holder simply pulls straight up. There might be a bit of resistance from some spring clips. The flaky debris is actually coffee from reusable K-cup filters.

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K-cup insert removed. Clean with hot water as needed. On the bottom of the K-cup insert is a tapered needle that punctures the bottom of the K-cup. On the side of it is a small hole. Use a paper clip (or similar) and insert it in there to remove any scale, coffee grounds etc. Next is to clean the top needle. It is  trickier since it is somewhat hard to reach around the sides of the needle. There will be three holes around the needle. Open the Keurig all the way, and again use a paper clip (or similar).
  • K-cup insert removed. Clean with hot water as needed.

  • On the bottom of the K-cup insert is a tapered needle that punctures the bottom of the K-cup. On the side of it is a small hole. Use a paper clip (or similar) and insert it in there to remove any scale, coffee grounds etc.

  • Next is to clean the top needle. It is trickier since it is somewhat hard to reach around the sides of the needle. There will be three holes around the needle. Open the Keurig all the way, and again use a paper clip (or similar).

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Deck the Halls
With tools and Fix Kits
A hypodermic needle or similar can also be used to open up the water outlet Next remove the water tank by simply lifting it up. On the inside bottom of the tank is a simple check valve that allows the removal of the tank, then empty the tank.
  • A hypodermic needle or similar can also be used to open up the water outlet

  • Next remove the water tank by simply lifting it up.

  • On the inside bottom of the tank is a simple check valve that allows the removal of the tank, then empty the tank.

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Top part of the check valve on the bottom. there is a fine screen that acts as a filter. Remove that by removing the three Phillips screws with a long #2 Phillips screwdriver. Clean the screen under running water with a brush. Reassemble after proper cleaning. Next step is to remove the top cover to get to the water supply to the K-cup.  Open the Keurig. remove two Phillips screws that hold it in place. Lift the top cover up and forward to remove it.
  • Top part of the check valve on the bottom. there is a fine screen that acts as a filter. Remove that by removing the three Phillips screws with a long #2 Phillips screwdriver. Clean the screen under running water with a brush. Reassemble after proper cleaning.

  • Next step is to remove the top cover to get to the water supply to the K-cup. Open the Keurig. remove two Phillips screws that hold it in place.

  • Lift the top cover up and forward to remove it.

This step..."Next step is to remove the top cover to get to the water supply to the K-cup. Open the Keurig. remove two Phillips screws that hold it in place."

Where are these screws?? Need picture of this

cashnic72 - Reply

cashnic72 step 4 second image has them outlined....

oldturkey03 -

They're circled in the middle picture.

David Baldon - Reply

After removing the screws, it was a little difficult to get the top off. Had to wiggle it around a bit and move the arm up and down to get it off

Rich Sigle - Reply

Water supply from the boiler to the K-cup needle is via a water hose through a check valve. Remove the two small screws that hold the water line to the inlet Unhook the water line from the connector above the K-cup needle. it is a simple press fit.
  • Water supply from the boiler to the K-cup needle is via a water hose through a check valve.

  • Remove the two small screws that hold the water line to the inlet

  • Unhook the water line from the connector above the K-cup needle. it is a simple press fit.

  • Next remove the tie straps. (You don't have to do this step) Just remove the other end of hose from pump. You might have to use a flat head screwdriver to lift up on end of hose while pulling up

Mine looks different inside

Jaime Pretell - Reply

Test the check valve. Blowing air in it from the boiler side should cause it to open. Repeat that a couple of times to loosen any sediments etc. It will also help to run some hot water from the K-cup side into the check valve and shake it up. Once it is cleaned, replace the check valve and the tie straps. Reassemble the Keurig
  • Test the check valve. Blowing air in it from the boiler side should cause it to open. Repeat that a couple of times to loosen any sediments etc. It will also help to run some hot water from the K-cup side into the check valve and shake it up. Once it is cleaned, replace the check valve and the tie straps. Reassemble the Keurig

This was so awesome and fixed the problem thank you so much very clear detailed instructions

kimbasstyle - Reply

Problem solved. I think it was actually the first fix of clearing out the air slot in the bottom needle that did the trick. Thanks! $179.00 saves from not buying a new machine. ;-)

Ray - Reply

what if you cannot blow air into the valve? Does that mean you have a bad valve and need to replace the entire machine?

Kristal - Reply

@gold0348 if you are trying it from the boiler side but cannot pass air through it, could be a stuck valve. You would not have to replace the machine but you’d have to try to find a valve. You could also try to use a small wooden pencil etc. to gently apply pressure against the valve by inserting the pencil into the boiler side opening.

oldturkey03 - Reply

Conclusion

To reassemble your device, follow these instructions in reverse order.

39 other people completed this guide.

oldturkey03

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31 Comments

Perfect - been looking all over for a solution besides trashing the unit.

Thank you for the step by step instructions!

kellywihlm - Reply

Awesome! didn't want to have to buy a new Keurig - worked like a charm!

cabate - Reply

awesome thank you kindley

racinnut2001 - Reply

Outstanding presentation. I've had my Keurig apart before. However, as I use well water and don't have the best filtration system, mine tends to clog frequently.

I will add however, that the case for, at least some Keurig coffee makers have clips holding the cover in place that can be rather difficult to release.

Bill Leach - Reply

I should add, excellent photography!

Bill Leach - Reply

09/30/2016

This guide and the photos are excellent! Kudos!

However, after precisely following each step I did NOT find any debris, from the K-cup holder, thru the top puncture needle, through the working check valve. Since NO clogs there, the problem is elsewhere.

Bob McGhee - Reply

I thought that, too, until I rinsed the cup holder under some hot water and smacked it upside down on the sink a few times. Two pretty large coffee grounds came out of somewhere when I did that. Now it works fine. Good luck!

Bucky -

Thank you for your diligence in providing this guide. My check valve was all gummed up....45 minutes later, it is making great coffee again!

paulcrustad - Reply

Excellent...Works like a charm. My K-cup holder was the culprit.

pskepple - Reply

I thought my old Keurig coffee maker was about to give up the ghost. It had slowed to just a trickle and wouldn't fill my cup anymore. This morning I took it apart and cleaned it, easily within 30 minutes from start to finish, using these simple step-by-step instructions with pictures. It's problem was clogged needles, top and bottom. Now it works like it's brand new again. These instructions saved me from replacing it this afternoon as I'd planned. The only expense I'm out was one paperclip and two plastic tie-ties. Not a bad deal if you ask me. Seriously, not a bad deal at all.

Bucky - Reply

After a long hour I figured out how to fix it. I give old turkey 3 a 30 for his directions and patted my FEMALE self on the back for a job well done.

Phyllis M. Newton - Reply

@pmnewt1 thank you Ma'am and I am glad it worked out for you.

oldturkey03 -

This is truly amazing helpful. I still can not figure out the cup trat but that's OK I guess lol at least it working better than before. Thank you so much

Sandra Decker - Reply

My go to plan is trying to take things as part and hopefully find the issue and hopefully get it all back together.

This eliminated all the hoping and got me right through to the meat of the problem.

Thank you for this awesome guide.

Mailman - Reply

We too were about ready to give up on our machine but gave one last internet search for a possible fix. This did the trick! Thanks so much oldturkey03...you da best!

anonymous 5519 - Reply

Thank you very much! This worked perfectly!! :)

missjones3077 - Reply

Thank you very much. From hot water getting pumped back to the water reservoir to clean noise free full cup of joe

William S Zelazny - Reply

We fixed our Keurig thanks to you!

deannagotte - Reply

Thank you so much! Worked like a charm. So glad you like to tinker oldturkey03!

thies - Reply

I tried all steps and water started coming out, but it pauses as if it was still clogged. Won't give me a full glass.

Andre Simmons - Reply

Omgawwwd!! My sister was going to toss her old one, or put it into her grauge sale. She gave it to me, I followed your direction to the T an I now have an awesome Keurig that preforms like new!! You are Awesome!!! Thank you, Thank you, Thank you!!

Barbara Stevens - Reply

Had a heck of a time getting the top to come off: it did not lift up and pull forward easily. Other than that problem, the cleaning process went fine. Thk you so much for posting those instructions.. I was about ready to toss my Keurig and go back to my “Mr. Coffee” Brewer!

david milright - Reply

Thanks for your great photos and very clear instructions. After doing all of your steps I ran an empty cycle and then the “descale” light came on. So, I ran half a gallon of vinegar through it and that worked like a champion…. for two days (total of three K-Cups) now it’s back to the same light trickle of water and the “descale” light is back on. I’ve already replaced the reservoir with a brand new on. Any idea? Could it be a bad check valve? Where can one find these parts?

Gary Bennett - Reply

Worked great for me!— with the exception that I've had trouble getting the cover back on correctly. I'll try removing it and repositioning it again today. It is now working alright as far as brewing goes, but something is binding the cover when I open and shut it to put in a K-cup. It makes a loud snapping noise unless I press down on the back of the cover with my hand when opening or closing it. But thanks for this great “remedy “!

Preston Smith - Reply

My check valve was stuck. Thank you for this tear down. With out it I couldn’t figure how to get the top off

Rich Sigle - Reply

Before I torn the coffee maker apart I unscrewed the round filter at the bottom of the water tank and washed it out it was very slimy and had a ton of sediment. used vinegar on the unit just last month, now it is working just fine

Carol Thompson - Reply

Perfect - been looking all over for a solution besides trashing the unit.

Thank you for the step by step instructions!

randy.pitcock - Reply

Son. This was the exact fix. I tried it the first time and it didn’t work. Followed the steps again, and spent a bit more effort on step 5. That was precisely the issue. Thank you for taking the time to make this help. Took me ten minutes to take apart and reassemble.

Nathan Allen - Reply

My machine was making a clicking sound like it was trying to flush water through but none was coming out. These directions worked perfectly for me. On the first try I didn’t spend enough time on step 5, and it didn’t work. But going through again and taking the time to flush the check valve did the trick.

Thank you!

Nathan Allen - Reply

I cleared the check valve as instructed and I still have water coming out of the side instead of the top any thoughts

Kathy Blake - Reply

As instructed I clean the check valve and the needles and the screen reassembled and I still have water coming out of the side valve any thoughts

Kathy Blake - Reply

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