Place Lord Krishna statue at the north-eastern corner, facing either East to West or West to East. However, you must also consider the rooms in the immediate vicinity. It should never be used in a bathroom or a bedroom. Rooms with neighboring walls should also be avoided.
Check which wall of your house faces which direction when you enter. When the idol is put in the northeast corner of the house, as described above, it is most effective. It's fine to face east to west or west to east, but never north to south. It's very close to Feng Shui principles. These guidelines and positioning show respect for the Krishna statue while also encouraging a healthy and pleasant energy flow.