I'm sure this must happen to a lot of them after seeing the reason, that's why I'm posting it. . I took the bottom off.... 4 regular phillips screws and 2 torx just so the average homeowner can't get it off
There's two tubes, one comes from the water reservoir to the heating element. Within this tube is a little check valve.
You can just squeeze it out of the tube, you're going to probably have something stuck in it. On mine it appeared to be a piece of silicon, possibly from a o ring or something... . I'm not sure how it got in there.
It's amazing though, I looked at that little valve and started thinking how many coffee pots must have be thrown away because of debris stuck in that valve. If you had a big enough piece of coffee ground it could certainly block it up.