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On a heat pump, the compressor and reversing valve carry the full heating load, cycling through cold nights and warming days alike. Homes in Custer County, SD run heat about nine months a year, from September through May. By late spring, those components have been working under sustained demand, and what a contractor finds when a system starts dropping capacity or tripping fault codes reflects the physical toll of that run. Refrigerant charge shifts, reversing valve seats wear, and the defrost board logs events that point toward cumulative stress rather than a single failure. A contractor diagnosing a heat pump here checks those parts first.
Half the homes in Custer County, South Dakota were built in 1994 or earlier (2020-2024 ACS 5-year). That puts a lot of the county's heat pump stock into a repair category where the work starts with what the opened unit contains. Coils corrode, contactors burn, and capacitors fail in ways that depend on how long the system has been running. What slows a repair here is whether the parts that system takes are still manufactured. A contractor will confirm part availability before committing to a scope, because an order that comes back discontinued changes the job entirely.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit is the piece most homeowners recognize on sight. It sits outside the house and holds the compressor and the condenser coil, both of which are frequent starting points when a heat pump stops doing its job. A failed compressor, a dirty or damaged coil, or a refrigerant leak at that unit will stop heat transfer cold.
Inside the house, the air handler moves conditioned air through the home and contains the indoor coil and the blower motor, either of which can be the source of weak airflow or temperature problems. The reversing valve, which lives in the outdoor unit, is what lets the system shift between heating and cooling, and a fault there often shows up as the system blowing the wrong temperature entirely.
The drawing shows a typical layout, and a licensed contractor determines which components apply and what work is needed in your specific home.
Find a contractor in Custer CountyCuster County, by the numbers
530 severe weather events were recorded in Custer 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 Custer County, South Dakota were built in 1994 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCuster County, South Dakota holds 5,291 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 85.6% of the occupied homes in Custer County, South Dakota (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Custer County
Extreme weather puts real stress on heat pump systems, forcing the equipment to work harder and wear faster than it would under mild conditions. How often that happens in Custer County shapes what local repair work looks like and how quickly problems tend to develop.
530 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.