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A central AC compressor in this county spends most of the calendar waiting. Homes in Codington County, SD run cooling in a single month of the year, July. When the system finally starts, any refrigerant leak that developed over the off-season, any contactor that pitted during storage, any capacitor that weakened from disuse will show itself fast under full load. A contractor diagnosing a failure here checks the components that degrade while the unit sits: the capacitor, the contactor, and the refrigerant charge. The compressor itself may be sound; the parts that let it start and stop are where the damage accumulates.
Older ductwork carries a record of every system that ran through it, and in housing stock this age that record is long. Half the homes in Codington County, South Dakota were built in 1978 or earlier (2020-2024 ACS 5-year). A contractor pulling the covers off a central AC unit here often finds field repairs, adapted connections, or components sourced to fit rather than specified for the unit. Whether the parts a system like this takes are still manufactured is a real question, and the answer shapes the repair scope before any other decision gets made.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit sits outside the house, usually on a concrete pad against an exterior wall, and it carries the compressor and the condenser coil. These are the pieces a contractor reaches first when a system stops cooling, because a failed compressor or a dirty, damaged coil will shut down the whole system. The air handler lives inside, in a closet, attic, or basement, and it holds the evaporator coil and the blower that moves air across it.
The evaporator coil is where the system pulls heat out of indoor air, and a frozen or leaking coil is one of the more common reasons a repair call gets made. A metering device, often a small expansion valve near the indoor coil, controls refrigerant flow between the two units. Refrigerant lines connect the indoor and outdoor sections, running through the wall, and a contractor checks those lines and their fittings when the system is short on refrigerant.
The drawing shows the general layout of a central AC system, and a licensed contractor determines what applies to this particular house.
Find a contractor in Codington CountyCodington County, by the numbers
167 severe weather events were recorded in Codington County, South Dakota 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 Codington County, South Dakota were built in 1978 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodington County, South Dakota holds 13,533 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 69.8% of the occupied homes in Codington County, South Dakota (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Central AC Repair in Codington County, South Dakota8 sourced rules and standards
What happens when a contractor comes out
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.
Severe Weather Events in Codington County
Extreme weather puts real stress on central AC systems, shortening component life and driving repair needs that a mild climate would not produce. What happens in Codington County stays local, and the repair work follows the same pattern.
167 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.