I lowered the thermostat

Prior to buying our new home, my husband and I hired a local HVAC professional to inspect and analyze the heating and cooling system.  The technician assured us that all components were in good working order. Once we moved in, my husband and I started a huge renovation project.  The house is extremely old, and very few upgrades had been completed over the last fifty years. There was insufficient insulation in the walls and the electrical wires were not up to code.  The plumbing system was terribly corroded, and all of the windows needed to be replaced. We were relieved that the duct system was in decent condition. My husband gutted the walls and ceilings down to the bare studs and refinished all of the hardwood floors.  Although the outside temperature was rather warm and humid, we didn’t dare run the air conditioner because of all of the dust. We instead opened the windows for ventilation. Once the project was finally complete, we were anxious to clean up, lower the thermostat, and get some relief from the heat and humidity.  The cooling system ran for approximately twenty minutes before it quit. When my husband checked the air filter, he found it entirely clogged with dust and debris. Cleaning the filter, however, didn’t fix the problem. We were forced to call the HVAC contractor back for a repair. He told us that the construction dust had infiltration the cooling unit through the supply and return vents, blocking airflow and leading to the malfunction.   He suggested that for future projects, we make sure to seal off the duct system entirely.