Open land, lightning and long power lines
Rural homes are more exposed to lightning because there are fewer tall buildings and trees nearby, and long power lines can carry surges for miles. Control boards, capacitors and compressors are the usual casualties. Summer thunderstorms are frequent, so a surge protector at the panel or the unit is a worthwhile topic.
Dust from fields and dirt roads, pollen, and insects add to the maintenance load. Outdoor coils can clog with seed fluff and grass clippings, and wasps or ants may nest in control boxes. Many properties also have detached garages, workshops or guest quarters that carry their own small HVAC systems and are easy to overlook.
