I had the same half pot thing start happening and it turned out to be a few dumb little things stacking up and... the carafe lid on mine has a tiny vent that lets steam escape and if that gets gunked up, the brew slows and the machine thinks it is done... I popped the lid apart, cleaned the vent and gasket, and it was a night and day difference. Also check that the basket and lid are fully seated. If the basket is a hair off, the drip stop can be partly closed and you get a weak trickle.
Another gotcha was filter collapse. I was using a fine grind and filling the basket high, the paper sagged and blocked the outlet so water backed up and bailed out early. Total mess. Wetting the paper filter first, using a slightly coarser grind, and not going past the suggested scoop count fixed it for me. Try a brew with no grounds to see the flow, then add grounds back in and compare. If the water only stalls when you add that model, it is a basket flow problem not a pump problem. Learned that the hard way.
