OP, I went through 3 Aquapro feeders before getting one that worked. Now, (knock on wood) this last feeder hasn't missed a beat since July.
My next feeder purchase is the Sweeney Big Mouth, for whenever my pond rises enough to actually stock some LMB.
I'm a big time fan of Monarch, they make great blinds, quad pods, deer feeders etc. I sill use a controller I bought from them in 1997.