Heating tune-up completed during inspection I found that the customers UV light was no longer operational, recommended replacement of the UV bulb due to them only lasting 2 years customer agreed bulb swapped. System is operating efficiently all all electrical components are operating properly and safely, electrical connections tight and secure throughout. Refrigerant levels acceptable airflow acceptable During my visit customer expressed a couple of concerns to me One of them being one room had seemed to be be colder or hotter than the rest of the house, when inspecting duct and vent I found that the event for this room was actually just blowing into the hallway, flipped vent around for customer to see if this will change anything room has a giant window and does have a small difference in temperature. Cuz we're also explained to me that they are not happy with the dust levels in the home seem to have a lot of build up, my recommendation for fixing this is a air cleaner upgrade which