What does it mean when the Keurig screen says "prime" and the light in the reservoir keeps flashing?
Hello, and thank you for using this service. I'll be helping you with your problem today.This error means that the coffee maker doesn't think that there is water in the reservoir so it wants you to take the reservoir out and fill it with water. If the reservoir is already filled with water and just removing the reservoir and putting it back in solves the problem, it sounds like you just have a bad control board that isn't sensing the water correctly.
Would it also mean that it would need cleaning with vinegar?
you can try to clean it out with vinegar, but generally a different error will happen if you have an issue with sediment building up. It's still worth a shot.