Before purchasing our new home, my husband and I hired a licensed HVAC contractor to completely inspect the furnace and central cooling system. We wanted to make sure the equipment was in peak working order and would last for quite a few more years. Once we moved into the home, my husband and I started on renovations. There was lots of things we wanted to upgrade. We tore down walls, ripped up floors, replaced windows, and bought new appliances. We added more electrical outlets, replaced the overhead fixtures, and installed new kitchen cupboards and countertops. The remodeling project took us several months to complete, and we generated a great deal of dust and debris. We figured it was best not to operate the air conditioner while we were working on the house. We kept the windows open to take advantage of a bit of ventilation. Because we started the work in the early spring, by the end of the job, the outside weather had warmed up considerably. The house was starting to feel extremely overheated and sticky, and we were anxious to get everything cleaned up and turn down the thermostat. The air conditioner made some strange noises when it first cycled on, but it effectively cooled the house down. Unfortunately, the cooling system only ran for a couple of hours before quitting. We immediately called the HVAC contractor back for repair. We couldn’t understand what had caused the air conditioner to fail. The HVAC contractor took the system apart and showed us the inner workings. They were completely clogged with construction dust and debris. The technician suggested that we cover the supply and return vents before attacking an further remodeling projects.