Tell us about the job
Takes about a minute. No obligation.
A contractor assessing a failed central AC unit in Dearborn County has to sort out how much of what they find the weather actually explains. 87 severe weather events were recorded in Dearborn County, Indiana between 2015 and 2024. That puts severe weather somewhere in the normal background of operating here, real but not dominant enough to account for most compressor failures or refrigerant loss on its own. A system that has been skipping annual service and is past its expected lifespan will show the same worn contactors and degraded capacitors regardless of the season count. The contractor checks maintenance records and the age of the equipment before the weather record enters the diagnosis.
Ductwork and wiring in a house tell you what year the building went up. What they cannot tell you is what the opened compressor, contactor, or control board turns out to be, and whether a contractor can still source what it takes. Half the homes in Dearborn County, Indiana were built in 1982 or earlier (2020-2024 ACS 5-year). Equipment installed into that stock over the decades since has its own age, and when a repair job opens a system here, the question is often whether the failed part still has a supply chain behind it. A contractor sourcing for a system of that vintage may be working a narrower parts list than the equipment model number suggests.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit sits outside the house, usually on a concrete pad beside the foundation, and it is where the system sheds heat to the outside air. The compressor lives inside that cabinet and is one of the first things a contractor looks at when the system is not cooling. A failed compressor or a refrigerant leak at the condenser often explains why a central AC runs but does nothing useful.
Inside the house, the air handler or furnace cabinet holds the evaporator coil, which is the piece that actually pulls heat out of the indoor air. The blower fan in that same cabinet moves air across the coil and pushes it through the ducts. The refrigerant line that runs between the two cabinets, and the metering device that controls refrigerant flow, round out what a contractor traces when the problem has not shown itself at the obvious points.
The drawing shows a typical layout, and a licensed contractor determines which components and conditions apply to your specific home.
Get matched in Dearborn CountyDearborn County, Indiana, by the numbers
87 severe weather events were recorded in Dearborn 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 Dearborn County, Indiana were built in 1982 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesDearborn County, Indiana holds 21,098 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 85.2% of the occupied homes in Dearborn County, Indiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Central AC Repair in Dearborn County, Indiana8 sourced rules and standards
What happens when a contractor comes out to repair your HVAC
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 Dearborn County
Dearborn County weather puts real load on central AC systems, and sustained stress is one of the main reasons repair calls happen. How much stress depends on what the local record actually shows.
87 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.