The ductless mini split has many terrific advantages for both homes and businesses: high energy efficiency, zone control, less dust and dirt blown out from ductwork, and flexibility for buildings both new and old.
One advantage that doesn’t often get brought up: because there are multiple air handlers—the small units placed in different rooms around the house—rather than the single one used in standard central air conditioning, if one of the air handlers fails to work, it won’t affect the others. A house or commercial building doesn’t have to lose all its heating or cooling; only one zone is affected.
Of course, there’s still a problem—a failed air handler! If you have an air handler that isn’t sending out heated/cooled air or isn’t turning on at all, you’ll definitely want that fixed. Here are some of the possible reasons for one of your ductless mini split indoor units to stop working: