@halljon ,Jonathan, May have a build of lime,etc. that may need flushed out of orifice/tube to pump under water reservoir. The links below may solve your issue with your Keurig. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=Q2oEfcjYgpI
https://www.youtube.com/watch?v=joFi8s9tvDA
https://www.youtube.com/watch?v=SUL7NAt1dKY
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