I have a 3 year old Mohawk engineered floor. About 50% of the planks have splits/cracks. The cracks are not between the planks, but in the middle or on the ends of the planks. Is this normal? Mohawk is saying it's industry standard as is my installer.

Sounds like your floor got too dry and checked. Humidity below 35% will do this

By a hygrometer to check the ambient conditions inside the area experiencing this. Anything below or near 35%rH, is going to dry the wood out and make it shrink. After too much shrinking, the only thing left for it to do to shrink more, is split.

Do you live in Arizona, by chance, where the rH is in the teens most of the time?

I too have Mohawk engineered wood that is doing the exact same thing. Mohawk is giving me quite a run around as is the company who installed it. I know you posted this is June/July, but has anything come of this by now. The way Mohawk acted about my claim, I would never buy another product from them.

lcstout didn't answer us, because I think we gave them the answer. Low rH and MC is not manufacturing in any way.