The tape that was put on the newly installed return was falling off. I pulled off the loose tape and re-taped the seams. I also found some duct tape that was used on the indoor coil. I pulled that tape off since it was falling off the unit and re-taped those joints as well. I took a video with the system, running on high speed to show that there was no noise coming from the system. The air filter needs changed out ASAP..