Found low air flow from master bedroom and bath. Found that the dampers are located at the termination box at register. Bedroom and master walk-in are open. Checked furnace and found filter clogged. Removed and tested temp rise. 39 is what was found. Replaced with new filter and lowered fan speed to med. re took temp rise. Rise is now 46. This increases the temp at the registers. I measured 95 at the register in master bedroom. This should help with the issue. Recommend customer to run fan continuously. Customer will call if issue continues. Job complete.