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The compressor in a central AC unit starts and stops every time the thermostat calls, and in Clarendon County it does that through a long cooling push each year. Homes in Clarendon County, SC run cooling about five months a year, from May through September. By September, the contactor that switches the compressor on and off has opened and closed thousands of times, and that is where a contractor looks first when a system limps into a repair call. Capacitors and contactors fail under accumulated cycle load. A unit that has been running correctly sized and well charged will show wear there before it shows it anywhere else.
Ductwork in a house carries the history of every system that has run through it. Connections get adapted, sections get patched, and what a contractor finds when a repair opens the system up is often a record of those changes rather than a clean installation. Half the homes in Clarendon County, South Carolina were built in 1990 or earlier (2020-2024 ACS 5-year). That matters for repair work specifically because a failing component does not always explain a system's behavior on its own. If the duct connections feeding the unit were sized or sealed for something different, a replaced part restores only what the part was doing, and the underlying airflow problem stays.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit sits outside the house, usually on a concrete pad beside the foundation, and it carries the compressor and condenser coil. The compressor is where contractors look first when a system stops cooling. A failed compressor, a refrigerant leak at the coil, or a burned capacitor in that cabinet accounts for a large share of repair calls.
Inside the house, the air handler holds the evaporator coil and the blower fan. The evaporator coil is a common source of freeze-ups and slow leaks, and the blower motor is what moves conditioned air into the duct system. A contractor also checks the thermostat and the refrigerant lines that run between the two units, since a fault anywhere along that path affects the whole system.
The drawing shows the general layout of a central AC system, and a licensed contractor determines which components apply and what needs attention in your specific home.
Get matched in Clarendon CountyClarendon County, by the numbers
121 severe weather events were recorded in Clarendon 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 Clarendon County, South Carolina were built in 1990 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesClarendon County, South Carolina holds 16,089 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 72.9% of the occupied homes in Clarendon County, South Carolina (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Governing Central AC Repair in Clarendon County, South Carolina9 sourced rules and standards
What the repair visit looks like
Split-system central air conditioners rated below 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners rated at or above 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners manufactured between January 1, 2015 and December 31, 2022 had to meet 13 SEER, the metric that preceded SEER2.
Single-package central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Space-constrained central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 11.7 SEER2.
Federal efficiency standards for split-system central air conditioners and heat pumps are set on each certified combination of outdoor unit and indoor coil rather than on the outdoor unit alone.
Residential and light commercial air conditioning and heat pump systems assembled in the field, including mini-splits and unitary systems, may not be installed on or after January 1, 2025 using a refrigerant with a global warming potential above 700.
A field-assembled system whose specified components were all manufactured or imported before January 1, 2025 carries no installation compliance date under the refrigerant restrictions and may still be installed.
Licensing Rules for HVAC Work in Clarendon County, South Carolina
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 Clarendon County
Weather puts a measurable load on cooling equipment, and that load accumulates differently depending on where the equipment runs. A contractor sizing and repairing central AC in Clarendon County is working against local conditions, not a national average.
121 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.