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A heat pump in Johnson County has been running against real weather pressure, but the record here sits closer to ordinary than extreme. 84 severe weather events were recorded in Johnson County, Indiana between 2015 and 2024. At that rate, severe weather is a factor a contractor accounts for rather than the first place they look when something fails. Refrigerant lines, capacitors, and reversing valves wear on their own schedule, and a system that has been undersized, poorly charged at install, or skipped on filter changes will fail well ahead of one that has simply met the area's storms. Before a contractor prices a repair, they are establishing whether the failure traces to that wear or to something correctable.
Half the homes in Johnson County, Indiana were built in 1993 or earlier (2020-2024 ACS 5-year). A house built around that time was likely wired and ducted for a heat pump or a close equivalent from the start, so the building itself rarely drives how a repair job goes. What drives it is what a contractor finds once the unit is open: whether the compressor, reversing valve, or refrigerant lines have held up, and whether the replacement parts for a system of that vintage are still in production. That is the question a repair quote in this county is actually answering.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit sits outside the house and holds the compressor and the outdoor coil. These are the pieces a contractor reaches first when something is wrong, because the compressor drives the whole system and the coil is where heat exchange actually happens. A failed compressor or a damaged coil will stop a heat pump cold.
Inside the house, the air handler holds the indoor coil and the blower fan, and it is usually in a closet, attic, or utility room. The refrigerant lines run between the two units, and the reversing valve inside the system is what lets a heat pump heat or cool. A fault in any of these will show up as weak airflow, wrong temperatures, or a unit that runs but does nothing.
The drawing shows a typical layout, and a licensed contractor determines which components apply to your specific home and system.
Find a contractor in Johnson CountyJohnson County, Indiana, by the numbers
84 severe weather events were recorded in Johnson County, Indiana 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 Johnson County, Indiana were built in 1993 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesJohnson County, Indiana holds 65,915 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 72.7% of the occupied homes in Johnson County, Indiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Johnson County
Stress on a heat pump accumulates with the weather it works through. What the climate delivers in Johnson County sets the real workload on the equipment, and that workload shapes when repairs become necessary.
84 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.