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Homes in Pennington County, SD run heat about nine months a year, from September through May. A heat pump runs its reversing valve and refrigerant circuit hard through cold weather, and in Pennington County that means the heating side of the system takes the bulk of the wear. When a unit comes in for repair, a contractor checks the reversing valve, the refrigerant charge, and the defrost controls first, because those are the components the heating season loads most. Compressor health follows directly from how that circuit has been maintained.
Electrical connections in an older heat pump degrade quietly. Contacts corrode, wiring insulation hardens, and refrigerant circuits develop slow leaks that a system can mask for a season or two before efficiency drops sharply enough to notice. Half the homes in Pennington County, South Dakota were built in 1982 or earlier (2020-2024 ACS 5-year). A contractor opening a heat pump in stock like this checks the condition of wiring terminations and measures refrigerant charge before drawing any other conclusion, because those two items account for a large share of the faults that look like compressor failure on first inspection but are not.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit is the piece most homeowners recognize, sitting on a pad or brackets outside the house. It holds the compressor and the condenser coil, and when either one fails, the system loses its ability to move heat in either direction. The compressor is where a contractor looks first when the system runs but produces no heating or cooling.
Inside the house, the air handler contains the blower motor and the evaporator coil, and it is the piece behind problems like weak airflow or ice buildup on the lines. Connecting the two units are the refrigerant lines and the reversing valve, which is the component that lets a heat pump shift between heating and cooling modes. A faulty reversing valve is a common reason a system heats in summer or cools in winter.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines which components apply to your specific house and situation.
Find a contractor in Pennington CountyPennington County by the numbers
1,271 severe weather events were recorded in Pennington 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 Pennington County, South Dakota were built in 1982 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesPennington County, South Dakota holds 51,681 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 69.3% of the occupied homes in Pennington County, South Dakota (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Pennington County
Extreme weather puts mechanical stress on heat pump components, and that stress accumulates over time. How hard the weather bears down in a given county shapes how often the equipment needs attention and what kind of repair work comes up most.
1,271 severe weather events, 2015–2022. Source: NOAA National Centers for Environmental Information, Storm Events Database.