I found your problem.
(Scroll down the page.)
Seriously, if you could find the installation instructions on the new 'improved' Facet web site, you'd see that they 'strongly recommend' a filter prior to the pump. You'd also see that the recommended installation orientation is the mounting tabs in a vertical plane, and the flow line in an upward 45 degree angle.
Obviously, almost none of us orient them that way and they still work. But trash is a pretty reliable way to make one quit working. IMO, it's a shame that the a/c kit companies haven't adopted automotive style in-tank 'sock' type filters. They're virtually clog proof, and self cleaning, for the life of the vehicle.