If it cannot be moved
A master bedroom in the north-east loads the most protected corner with permanent weight, which the tradition treats as a real fault. The remedies are to move the bed to the room’s south-west, keep the north-east of the room open and low, and use the room lightly if a second bedroom exists.
What the ઈશાન governs
The north-east — Ishanya — is the most protected corner in the whole mandala. It carries water and belongs to Shiva, and every school agrees on the same instruction: keep it light, clean, open and low. Almost every serious Vastu fault is some version of loading this corner.
Where the મુખ્ય શયનકક્ષ belongs
The master bedroom is meant to sit in the heaviest, most settled part of the house, on the theory that the person carrying the household should sleep where the building is most grounded. It is a placement about stability rather than energy.