What happens if airflow is too low?

Severely low airflow in a residential heating and cooling system leads to a cascading series of mechanical failures, energy inefficiency, and indoor discomfort. When restricted airflow prevents conditioned air from circulating properly, indoor temperatures become uneven, leaving rooms stuffy and uncomfortable. Mechanically, low airflow starves the indoor evaporator coil of heat absorption, causing the coil to drop below freezing and encase itself in a solid block of ice, which can destroy the outdoor compressor through liquid slugging. Furthermore, restricted airflow forces blower motors to work harder against high static pressure, driving up electricity bills. You can troubleshoot by checking for dirty air filters or closed vents. You can verify that normal operation is restored when cleaning filters and clearing ducts return powerful airflow.