Upon arrival for callback on 2021 Carrier furnace, found that system boot that goes to trap had fallen off, water was leaking down furnace to the floor, cleaned water up inside furnace and reattached boot. System operating as intended. I noticed ever so slight leak on 3” portion of exhaust. Don’t have necessary 3” to make repair attaching pictures will most likely need addressed. Customer also said it was mentioned to him about putting dampers in?