Chosen Solution
hi … i have a keurig k40 …that every couple months decides to not make a full cup of coffee … tried everything shown in info i seen on this site…last couple times i had this problem …on the top theres a check valve that i took apart ..cleaned etc and watever i actually really did im not sure ..but works than for a month or 2 same issue …would it help changing check valve ? or would this k40 have a solenoid that could be causing issue ?
From what I can gather it might be that the needle that is used to puncture the K-Cup might be dirty. You can take a paper clip and see if that will dislodge any grounds that might have built up. Otherwise I would check your water pump, as that might be causing the issue.
