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On a repair call in Richland County, a contractor starts with the compressor and the condenser fan, because those are the parts that have been cycling hardest. Homes in Richland County, SC run cooling about five months a year, from May through September. By the time a homeowner calls for a repair, the contactor and capacitor on a system here have seen real work, and a contractor who skips them on a diagnosis is likely to miss the actual failure. A refrigerant leak or a worn contactor does not announce itself until the system is under load, which is exactly when it fails.
Opened equipment in this county tells you more than a fault code does. Capacitors, contactors, and refrigerant metering components from systems installed into houses this old have run a long way, and what they look like inside is specific to that run. Half the homes in Richland County, South Carolina were built in 1989 or earlier (2020-2024 ACS 5-year). Stock of that vintage was built when different equipment was the norm, which means a contractor working on a system installed here later has to check whether the parts it actually needs are still in production, not assume they are.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit sits on a pad outside the house and holds the compressor and condenser coil, the pieces that shed heat to the outside air. When the system runs but cools poorly, or makes noise, or trips a breaker, the contractor starts here. The compressor is the heart of the refrigeration side, and the condenser coil and its fan are what let it do its job.
Inside the house, the air handler or furnace cabinet holds the evaporator coil and the blower. The evaporator coil is where the cold happens on the indoor side, and a frozen coil, a refrigerant leak, or a failing blower motor will each show up here. The refrigerant lines running between the two units and the expansion valve that meters refrigerant flow are also points a contractor checks when the symptoms point that way.
The drawing shows the typical layout of a central system, and a licensed contractor determines which components apply to your specific setup.
Get matched in Richland CountyRichland County, by the numbers
440 severe weather events were recorded in Richland 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 Richland County, South Carolina were built in 1989 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRichland County, South Carolina holds 187,611 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 60.3% of the occupied homes in Richland County, South Carolina (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Central AC Repair in Richland County, South Carolina9 sourced rules and standards
What the Repair Work 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 Richland 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 Richland County
Weather puts real load on central AC equipment, and the strain shows up later as wear that calls for repair. How much stress a system accumulates over the years is a local question, shaped by what the sky does here in Richland County.
440 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.