Whirlpool Frig. I have a whirlpool which was not hardly making cubes and when it did would make

Question

I have a whirlpool which was not hardly making cubes and when it did would make small ones.  I was told it was the ice maker, so I bought a new one and even a new line.  Well it is making big cubes like when it was new, however, it hardly fills the bin.  It use to fill the bin in approx 72 hrs or less.  What is wrong now?  Mdl # ED25DQXDN02, SER#:  SE4911308