Can bed bugs live in a couch?

They can but generally it will be the bed area & nearby furniture first. They tend to congregate in cracks like roaches & if you have ever seen roach droppings, they look similar. Pay particular attention to any wood trim & look around screw holes or any seams with piping. They will tend to stay towards the surface & not get too deep inside. Don't permit a heat treatment if fabric held on with adhesive-it will come unglued.