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A heat pump asked to carry the heating load in Campbell County works its compressor and reversing valve through repeated thermal cycling across a long, cold stretch. Homes in Campbell County, SD run heat about nine months a year, from September through May. The compressor starts and stops thousands of times across that run, and the reversing valve switches direction every time the system defrost cycle kicks in. By the time a homeowner calls for repair, those parts have already accumulated hard service. A contractor here checks valve function and compressor draw before chasing refrigerant charge or electrical faults, because that is where the wear lands first.

Ductwork designed around one generation of equipment and later adapted to carry a heat pump creates conditions that accumulate quietly and show up when something finally fails. Half the homes in Campbell County, South Dakota were built in 1960 or earlier (2020-2024 ACS 5-year). A contractor who opens a heat pump in a house from that era finds wear patterns the ductwork contributed to: restricted airflow stresses the compressor, and refrigerant circuits that have worked harder than they should show it in the coils and the connections. Parts availability for systems running under those conditions is the second question, and it is not always a short answer.
The Parts of a Heat Pump a Contractor Checks First

The outdoor unit is the piece most homeowners recognize: a metal cabinet that sits on a pad beside the house and holds the compressor and the outdoor coil. The compressor is the part a contractor reaches for first when a heat pump stops moving heat at all. The outdoor coil is the next suspect when the system runs but the air coming in feels wrong.
The air handler lives inside the house, usually in a utility closet, basement, or attic, and it holds the indoor coil and the blower that pushes conditioned air into the home. The reversing valve, which sits inside the outdoor unit, is what lets the system shift between heating and cooling, and a failed valve is a common reason a heat pump works in one mode but not the other. The refrigerant lines running between the two units and the expansion valve are also points a contractor checks when the coil or compressor tests out fine.
The drawing shows the general layout of these components, and a licensed contractor determines which parts apply to the specific system and setup in your house.
Find a contractor in Campbell CountyCampbell County by the Numbers
131 severe weather events were recorded in Campbell 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 Campbell County, South Dakota were built in 1960 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCampbell County, South Dakota holds 920 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 76.3% of the occupied homes in Campbell County, South Dakota (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Campbell County
Extreme weather puts heat pumps under load they were not designed to carry indefinitely. Repair demand in Campbell County follows what the sky does, which is why local weather history belongs alongside local service.
131 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.