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When a mini-split stops cooling, the compressor is where a contractor looks first. Homes in Union County, SC run cooling about five months a year, from May through September. Across those months the compressor cycles on and off daily, and each start puts mechanical stress on the motor windings and the contactor points. By the time a homeowner calls for a repair, those parts have absorbed seasons of that cycling. A contractor working Union County also checks the refrigerant circuit and the coil for fouling, because a long cooling run draws air across that surface continuously and debris builds.

A mini-split sitting inside a house this old is often running on borrowed time in the parts department. Half the homes in Union County, South Carolina were built in 1972 or earlier (2020-2024 ACS 5-year). That puts a contractor in a specific position: once the unit is opened, the question is whether the capacitor, board, or refrigerant valve it needs is still being made for that model, or whether the repair becomes a sourcing problem before it becomes a labor problem. Older housing stock accumulated systems across many replacement cycles, and the equipment inside any given house may be well past the window when parts move quickly.
The Parts of a Mini-split a Contractor Checks First

The indoor air handler mounts high on a wall inside the room and pushes conditioned air directly into the space. When this unit is the problem, you might see ice on the coil, poor airflow from a failed blower wheel, or a drain pan that overflows because the condensate line is blocked. The evaporator coil and the blower are the first things a contractor pulls apart in there.
The outdoor condenser unit sits on a pad outside the house and holds the compressor, the condenser coil, and the refrigerant lines that tie the whole system together. A failing compressor, a refrigerant leak at the line set connections, or a condenser coil clogged with debris can all stop the system from doing its job. The copper line set running between the two units is also on the checklist, since a breach there affects both sides.
The drawing beside this text shows the general layout of a mini-split system, and a licensed contractor determines what applies to your specific home and equipment.
Get matched in Union CountyUnion County, SC, by the numbers
73 severe weather events were recorded in Union County, South Carolina between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Union County, South Carolina were built in 1972 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesUnion County, South Carolina holds 13,527 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 71.3% of the occupied homes in Union County, South Carolina (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRepair Rules & Licensing Standards for Mini-Split Work in Union County, South Carolina1 sourced rules and standards
What Union County, South Carolina Requires for HVAC Repair
South Carolina requires a mechanical contractor license for contracting work whose total cost of construction is greater than ten thousand dollars.
Severe Weather Events in Union County
Weather puts real hours on heating and cooling equipment. How hard a mini-split works over its life is a local question, shaped by what the climate here asks of it.
73 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.
