A:Answer Watch out. NOT all over-the-range microwaves are the same HEIGHT. The old Kenmore you have is 15 1/2 inches high. I know because I have the same one from 1995 and it just died. All the new ones for over the range are either a lot shorter in height or about 16 1/2 inches high. I Don't know what the code is for clearance between your range top and the bottom of the microwave, but this extra inch might put you out of spec. Also, if you have tiles on the wall behind the range, like I do, and they were cut away to allow for the 15 1/2 inch high microwave to fit flush to the wall under the cabinet, then the taller ones will not fit. You will need to either
1) raise the cabinet,
2) cut more tile away, which is hard to do without breaking tiles
3) cut away the underside of the cabinet which may not be possible if it is a solid board
4) mount the microwave a tile-thickness away from the wall, This would be my preference. You would need to put a spacer the thickness of the tiles behind the new mounting rail. You may still be out of spec with the range-to-microwave clearance.