Cannot prime
I have the same unit. You need to descale it. Get a bottle of white vinegar (not the small bottle, the next size up). Unplug your Keurig. Empty out the water receptacle and flip your unit over in the sink to remove any residual water in your unit (I even shake mine a little to loosen up whatever is stopping it from priming. Fill the water receptacle to the top with white vinegar. Plug in the Keurig and turn it on. Cycle the unit (lift the lever, close it, push the button) and fill a cup with heated vinegar. Pour the cup out and continue until all the vinegar is gone, then fill the receptacle and keep doing this (I do it until the receptacle has emptied itself at least 3 times). If your Keurig will not allow you to cycle through this then the problem is internal with the pump. Call Keurig. If you are in your warranty period they will replace.
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