Hail and wind can leave damage behind a unit that still runs.
Hail strikes the thin fins that cover an outdoor coil, bending them over and limiting the airflow that carries heat away. A hard strike can also reach the tubing behind those fins, while windblown branches and other debris can press into the coil or fall through the top grille toward the fan assembly.
A unit may still start after a storm even when airflow has been restricted or a coil has taken concealed damage. We inspect the coil, cabinet, fan and surrounding equipment to separate light exterior damage from problems that affect cooling, refrigerant containment or safe operation.
Heavy rain and wind also affect the area around the equipment. Water standing at the base, moved panels, damaged conduit or a disturbed disconnect need attention alongside the unit itself. Thunderstorms can cause electrical disturbances as well, affecting capacitors, controls and other components without leaving an obvious mark on the outside.