I don't know what model you have but on the BH 3585, take the grill off the bottom and there is 2 screws to remove. Then you have to take the wide trim piece and frame off above the fridge and it is hard to do. Get ready to tear it off. Looking toward to rear you will have a angle bracket on top and it is attached to the wall with 4 screws. It will then roll out.
Hope this helps.
Billy