Black and silver single cup coffee maker with water reservoir on the left hand side.

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only brews small cups regardless of setting

My Keurig has started to brew small cups of coffee regardless of the setting it have it on. I usually make a large cup of coffee. I have cleaned it as per the directions to no avail.

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Chuck I have followed all of these instructions. Still only a small cup but notice that the resevoir bowl from which you next cup comes only has about half of a bowl. Is there a sensor or any way to make the bowl fill up? Thanks

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I have a somewhat similar problem: for a little while the large cup option delivers 8 oz instead of 10 oz (both small and medium size options work well). I followed the directions on this page, in addition to flushing the valve with white vinegar and let it soaked in it for a while to dissolve all the calcium carbonate deposits if there were any, but this hasn't solved the issue. The interesting part is that it always delivers the exact same amount. I think there might be an electronic problem related to the large cup option.

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RAISE the handle to the K-Cup ALL THE WAY UP as you inset the K-Cup, only then will all of the water dispense properly. If you listen closely, you will hear the gurgling of the water draining. I was given a K15 for my birthday, one out of 6-8 cups was full, then one day I raised the handle to the max and for the first time heard the gurgling...... PROBLEM SOLVED!

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worked perfectly! thanks for the excellent instructions! I also found the the K Cup holder comes apart.... a ton of greasy sludge in there too!!

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My solution was the same one I used when I first got my machine and it wouldn't do anything. I took all the removable parts off, took it to the sink, turned it upside-down and smacked the bottom about ten times. Apparently, sometimes the vacuum tube that sucks up the water gets full of air that needs to be pushed out.

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Chuck McCabe, I just finished fixing one from a buddy's shop. Same issue, no matter what it would only brew 4 oz at a time and took forever to do so. I did a few things. First I removed the plastic holder that holds the K-cups.

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This one is simply pulled straight up, but had a bit of resistance from some spring clips.

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On the bottom of that is a tapered needle that pokes the hole into the bottom of the K-cup. On the side of it is actualyl a small hole. Use a paper clip (or in my case I used a needle) and stick it in there to remove any scale, coffee grounds etc. As you can see from the first pictures, there will be a lot of coffee in and around it.

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Next you need to clean the top needle. It's a bit trickier since it is somewhat hard to reach around the sides. So open the Keurig all the way, and again use a needle or paper clip. There will be three holes around the needle.

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At this point I tried to see if it would finally brew a 12oz. coffee which it did not. Next I concentrate on the water intake. Remove the tank by simply pulling up on it

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On the bottom of the tank is a filter and a check valve. I removed the three Phillips screws from the filter and removed that from the tank. I cleaned it with some running water and an old toothbrush. It's a bit tricky to remove since you will need a long Philips screw driver. As a finally step I wanted to check the water supply to the needle for the top of the K-cup. If you take a look at the part where the top needle is mounted, you will see two Phillips screws that hold the top cover on. Remove those.

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Slightly lift and pull the top cover out.

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with the cover removed you can see where the water comes from the boiler through a check valve and then to the K-cup Needle.

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If that check valve has scale, sediments or other contaminants in it, it will not let the water get through properly. Unhook the check valve from the connector above the K-cup needle and remove the tie straps. Now you can remove the check valve. Try to blow in it from the boiler side and it should open. Do that a couple of times to loosen any sediments etc. I also run some hot water from the K-cup side into the check valve and shook it up. I did get quite a bit of debris out of that. Once I had it cleaned, I reassembled the valve, hoses and cover. I did replace the tie straps as well. Once fully reassembled, I did get the Keurig to brew 12oz 25 times in a row:-). Guess I fixed it. Biggest issue with this repair are the need for a long Phillips #2 to remove the screen from the tank, and to reassemble the two screws for the top cover. I did turn the Keurig upside down to get gravity to help me reinsert the screws. Hope this will work for you as well as it did for me.

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Worked great thank you for the help and advice

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This isn't an answer, it's a GUIDE (or at least should be).

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@mayer, thanks. you mean something like this How to open and clean Keurig Coffee Maker :-)

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Thanks for posting this info. Turns out our filter screen was gunky, though we only use filtered water. The Keurig is working as good as new!

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super! from one old guy to another- this should be a basic remedy for nearly all coffee pots. What about a solvent like vinegar or other type be used first to nullify the breakdown procedure? gusinshop

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I removed 3 screws, took out filter and cleaned.............now there is no way I can get screws back in????

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Get a magnet screwdriver it helps

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A magnet screwdriver helps

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Chuck McCabe will be eternally grateful.
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