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A contractor looking at a failed central AC unit in Bartholomew County has to sort out what actually wore the system down. 57 severe weather events were recorded in Bartholomew County, Indiana between 2015 and 2024. At that rate, severe weather is an occasional event here, not a standing condition, so it does not account for most of what goes wrong with a compressor or a coil. What a contractor finds instead tends to trace back to how old the equipment is, how it was originally installed, and how consistently it was serviced.
Ductwork and refrigerant lines installed to serve a house of that age were matched to equipment that has since been discontinued, revised, or superseded more than once. Half the homes in Bartholomew County, Indiana were built in 1979 or earlier (2020-2024 ACS 5-year). When a contractor opens a central AC unit in a house from that era, the question is whether the part it needs is still in production, and if a replacement compressor or coil is available at all, whether it fits a system whose original spec no longer appears in a manufacturer's current lineup. A unit still running in stock this old may be repairable, but the answer comes from what the opened system contains, not from the address.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit, sitting on a pad beside the house, is where most repair calls begin. It holds the compressor and condenser coil, and when either one fails, the whole system stops moving heat out of the house. The indoor air handler or furnace cabinet, tucked in a utility space, holds the evaporator coil, which is the other frequent problem spot.
The refrigerant lines run between those two units, and a leak anywhere along them will show up as warm air or ice on the coil. The thermostat, mounted on a wall in the living space, is the control point a contractor checks early because a wiring fault or a failed sensor there can mimic a much larger problem.
The drawing shows a typical layout, and a licensed contractor determines which components apply to your specific house and system.
Find a contractor in Bartholomew CountyBartholomew County, by the numbers
57 severe weather events were recorded in Bartholomew 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 Bartholomew County, Indiana were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesBartholomew County, Indiana holds 35,668 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 69.3% of the occupied homes in Bartholomew County, Indiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Behind AC Repair in Bartholomew County, Indiana8 sourced rules and standards
What HVAC Repair Looks Like in Bartholomew County
Split-system central air conditioners rated below 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners rated at or above 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners manufactured between January 1, 2015 and December 31, 2022 had to meet 13 SEER, the metric that preceded SEER2.
Single-package central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Space-constrained central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 11.7 SEER2.
Federal efficiency standards for split-system central air conditioners and heat pumps are set on each certified combination of outdoor unit and indoor coil rather than on the outdoor unit alone.
Residential and light commercial air conditioning and heat pump systems assembled in the field, including mini-splits and unitary systems, may not be installed on or after January 1, 2025 using a refrigerant with a global warming potential above 700.
A field-assembled system whose specified components were all manufactured or imported before January 1, 2025 carries no installation compliance date under the refrigerant restrictions and may still be installed.
Severe Weather Events in Bartholomew County
Every weather event that stresses a building also stresses the equipment inside it. How hard a central AC system works, and how often it needs repair, is shaped by what the local climate throws at it year after year.
57 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.