Bedroom not getting enough heat
Try closing all of the other vents, this should blast that room. If not, then that room's duct is either grossly improper, has a blockage or the ducting has separated. If it does blast that room, &amp; hopefully it does, then you'll want to keep that configuration for the most part. It's called Balancing &amp; you'll want to just crack the other rooms &amp; hall to a little bit more open for an equal or Balanced distribution or you may find that just 1 vent (hall) really affects the Balancing. You'll have to remove the grills that don't close &amp; block them with cardboard inside the fully re-attached grill for testing or Balancing &amp; also to repair their operation or replace them.