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A heat pump working a Buffalo County winter is doing its hardest work at the worst possible moment: outdoor temperatures drop, capacity falls, and the compressor cycles more often just to hold the setpoint. Homes in Buffalo County, SD run heat about eight months a year, from October through May. That extended heating demand loads the compressor and the reversing valve in ways that show up in repair calls well before the cooling side shows any trouble. A contractor diagnosing a failed heat pump here checks those components first, because the heating season is where the hours accumulate and where refrigerant leaks and valve wear have time to develop unnoticed.
Ductwork laid down for an earlier generation of heating equipment carries its own history into every repair call. Half the homes in Buffalo County, South Dakota were built in 1976 or earlier (2020-2024 ACS 5-year). A heat pump sitting in a house of that vintage may have been installed long after the house was finished, and the refrigerant circuits, contactors, and control boards it takes can be genuinely hard to source. When a contractor opens the unit, what matters is whether the components inside still have parts available, and that answer varies by system, not by address.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit is where most diagnostic work begins. It houses the compressor, which pressurizes the refrigerant, and the outdoor coil, which either pulls heat from the air or releases it depending on the season. When a heat pump stops heating or cooling, the compressor and that coil are the first things a contractor examines.
Inside the house, the air handler holds the indoor coil and the blower fan, which moves conditioned air through the home. Running between the two units, the refrigerant lines carry the working fluid, and the reversing valve near the compressor is what lets the system switch between heating and cooling modes. A fault in the reversing valve typically means the system runs in only one direction regardless of what the thermostat calls for.
The drawing shows the general layout of these components, and a licensed contractor determines what applies to the specific system and conditions in your home.
Find a contractor in Buffalo CountyBuffalo County, South Dakota, by the numbers
100 severe weather events were recorded in Buffalo 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 Buffalo County, South Dakota were built in 1976 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesBuffalo County, South Dakota holds 578 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 52.6% of the occupied homes in Buffalo County, South Dakota (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Buffalo County
Extreme weather puts real strain on heat pump systems, which have to work harder and longer to hold indoor temperatures steady when outdoor conditions swing hard. How much stress local weather puts on equipment is a local question, and repair needs in Buffalo County reflect it.
100 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.