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On a heat pump repair call in Randolph County, the refrigerant circuit and reversing valve have already carried the load of cold-weather demand before a contractor ever opens the unit. Homes in Randolph County, MO run heat about seven months a year, from October through April. Capacity drops as outdoor temperatures fall, so the compressor works harder at exactly the worst hours of a heating run, and wear on the reversing valve accumulates cycle by cycle through those months. A contractor quoting a repair here checks refrigerant charge and valve function before anything else, because those are the parts that absorb what a long heating season asks of this equipment.
Ductwork in houses this old tends to carry a long repair history before anyone opens the heat pump itself. Joints re-taped, sections replaced piecemeal, airflow balanced around systems that have come and gone. Half the homes in Randolph County, Missouri were built in 1974 or earlier (2020-2024 ACS 5-year). When a contractor pulls a heat pump apart, what the ducts are doing matters: restricted or leaking return air changes what the refrigerant circuit shows and can send a diagnosis in the wrong direction. A part that reads as failed on a pressure check may be responding to an airflow problem that predates the current equipment by a wide margin.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit is usually where a contractor starts. It houses the compressor, the condenser coil, and the fan that moves air across it. When that unit is the problem, a homeowner often notices the system running without heating or cooling the house, or hears sounds that were not there before.
Inside the house, the air handler holds the evaporator coil and the blower that pushes conditioned air through the home. Connecting the two units is a refrigerant line set, and the system also includes an expansion valve that controls refrigerant flow between them. A fault in any of these can produce symptoms that look similar, which is why a contractor works through each piece in order.
The drawing shows a general layout of a heat pump system, and a licensed contractor determines which components apply to the specific setup in your home.
Find a contractor in Randolph CountyRandolph County, by the numbers
61 severe weather events were recorded in Randolph County, Missouri 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 Randolph County, Missouri were built in 1974 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRandolph County, Missouri holds 10,862 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 71.4% of the occupied homes in Randolph County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Randolph County, Year by Year
Extreme weather puts heat pumps under load they were not built to carry indefinitely, and Randolph County's climate is part of what determines how hard the equipment works and how often it needs attention. That workload is a local fact, and the chart below reflects it.
61 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.