For this evaluation the customer stated they failed the home inspection because there was a "large temperature difference" from one side of the house to the other in the upstairs, as well as the door switch to the furnace was taped down. I removed the tape off the switch, however I'm not sure what the home inspector means but that as he did not use a number value for the difference he talked about. I had a 28⁰ Delta from the return to supply which is extremely good. The subcool was approximately 7⁰, with a 20⁰ superheat for the upstairs, and an 8⁰ subcool with a 17⁰ superheat indicating refrigerant levels were right where they need to be. All ducts were intact and vents were open.