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A heat pump running a heating season works its compressor and reversing valve hard in cold outdoor air, where the refrigerant cycle is already under strain. Homes in Greenwood County, SC run heat about five months a year, from November through March. By late winter, a system that has been cycling through that cold stretch will show wear at the reversing valve before almost anywhere else, because switching direction between heating and cooling is where mechanical stress concentrates. A contractor diagnosing a heat pump here pulls the refrigerant pressures and checks the reversing valve solenoid early in the job, not as a formality but because that component carries the load the heating months produce.
Ducting and wiring in a lot of Greenwood County homes were put in for a different system and modified since, and that history shows up once a contractor opens the equipment. Half the homes in Greenwood County, South Carolina were built in 1977 or earlier (2020-2024 ACS 5-year). That means a heat pump that presents with one symptom can turn out to carry corrosion, non-original connections, or line configurations that belong to whatever ran before it. The parts a current unit needs may fit; the surrounding infrastructure may need attention before the repair holds.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit sits on a pad beside the house and holds the compressor and condenser coil. The compressor is usually where a contractor starts: when it fails, the system runs but moves no heat. The condenser coil and its fan are next, because a blocked or damaged coil can produce the same symptom from a different cause.
Inside, the air handler hangs in a closet, attic, or utility room and contains the evaporator coil, blower motor, and expansion valve. The refrigerant lines connect the two units and carry the working fluid between them. The reversing valve, which sits in the outdoor unit, is what lets a heat pump heat and cool, and a stuck valve is a common reason a system blows the wrong temperature air.
The drawing shows a typical layout, and a licensed contractor determines which of these components applies to the specific system and situation in your home.
Get matched in Greenwood CountyGreenwood County, by the numbers
69 severe weather events were recorded in Greenwood County, South Carolina 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 Greenwood County, South Carolina were built in 1977 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesGreenwood County, South Carolina holds 31,702 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 67.0% of the occupied homes in Greenwood County, South Carolina (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Heat Pump Repair in Greenwood County, South Carolina1 sourced rules and standards
Licensing and Legal Requirements in Greenwood County, South Carolina
South Carolina requires a mechanical contractor license for contracting work whose total cost of construction is greater than ten thousand dollars.
Severe Weather Events in Greenwood County
Extreme weather puts heat pumps under strain, and how hard a system works over its life is shaped by local conditions. Repair needs in Greenwood County reflect that history.
69 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.