I have a Keurig for an office setting (with copper wire water feed line) Serial #E0029823 and on the small cup setting it only makes the smallest amount in the cup less than 1/2 an inch? The larger cup setting usually works fine. Why is this? Does the back filter thing need to be changed?

SOURCE: Keurig Special Edition B60

Hello,

I assume your coffe maker used to produce more coffee for each use. Roughly 6 ounces per large cup, and now is only making 3 oz. cups.

If your coffee maker is sputtering and not able to "suck" enough water to fill your cups of coffee it is most likely due to cavitation caused in the little pump due to a stoppage, which is most likely lime or scale buildup somewhere in the pump line.

To fix it, don't take your coffee maker apart. Get a bottle of distilled white vinegar, and pour it straight into the empty water resevoir. Press brew with no coffee pod so you are just running the vinegar through the system. Pour the vinegar out of the cup and back into the resevoir. Add some ice to cool it off. Repeat about 10 times. This should clear out the toughest lime scale clog.

After you notice the cups are filling full of water, Replace the vinegar with fresh water. Run about 5 or 6 cups of fresh water through the system to get rid of the vinegar.

Make coffee/tea/whatever.

Jade

SOURCE: Slow coffee stream and smaller brew size with B70

I had the same problem, contacted Keurig and they suggested the descale procedure, which did nothing. The brew size was very small, the display would not let me select the size, and water was being pushed back into the reservoir. I was able to resolve the problem however.
First I went through a gallon of white vinegar, without results. Then I did the following:
Went to Walmart and bought "Brew Rite". Tried 8 cup mixture (8 cups of water, two tablespoons of mix), did not work. Being persistant, put in another 8 cups, and when the reservoir was empty of the solution let sit 2 hours while unplugged and then put in clear water. By the time I got half way through with the clear water, the device started working properly, no problems since. This may work for you...

SOURCE: My Keurig dispenses about 3oz of water on next to largest setting

I JUST fixed (I Hope!) my 11 month old B60 by taking a paper clip and a straightened safety pin to the top of the coffee maker (where the top pin punctures the top of the cup) and the BOTTOM pin which punctures the bottom of the cup. (remove the bottom dark brown holder by pushing up on it).

After one or two attempts, I ran water through it without the coffee cup, then used a decaf cup and brewed it just fine....

SOURCE: Keurig B60 only filling partial cup

You are probably using a coffee that is ground to fine. This coffee brewer requires a course grind. If the coffee is to course it will restrict water flow and shut down.

SOURCE: keurig coffee maker does not make a full cup,

Check the needle to make sure it's not clogged. You can completely remove the k-cup holder and wash it out with your kitchen sink sprayer to help remove any obstructions. The manufacturer even recommends using the tip of a small paper clip to help push out any debris if needed. Then try brewing a cup of just water on the largest setting without a k-cup in it. Hope that helps! Best of luck...