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A contractor quoting a central AC repair in Franklin County has to work out what the system has actually been through before settling on a cause. 268 severe weather events were recorded in Franklin County, Ohio between 2015 and 2024. At that rate, severe weather is a regular part of the load every system here has been running against, not a rare event that sits outside normal wear. That matters for diagnosis because a compressor or condenser that has cycled hard through repeated weather stress fails differently than one that was undersized at installation, and the repair a contractor proposes depends on which failure it is.
Ductwork laid down for one generation of equipment and then asked to carry another accumulates problems that show up as repair calls rather than installation records. Half the homes in Franklin County, Ohio were built in 1979 or earlier (2020-2024 ACS 5-year). That history matters for repair work because a contractor who pulls a panel or opens a plenum in stock like this finds sealing, insulation, and airflow conditions that reflect decades of adaptation, not the original design. Parts availability for the unit is its own question, but what the ductwork has done to system performance is what shapes the scope.
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 holds the compressor and condenser coil. These are where a contractor looks first. A failed compressor, a refrigerant leak at the coil, or a seized condenser fan motor will each stop the system cold, and each shows up differently on a gauge or a meter.
Inside the house, the air handler or furnace cabinet holds the evaporator coil and the blower fan. A frozen evaporator coil, a failing blower motor, or a clogged drain line all trace back to this cabinet. The thermostat, which sits on a wall in the living space, rounds out the system and is often where a contractor confirms whether the fault is electrical or mechanical.
The drawing shows the general layout of a central AC system, and a licensed contractor determines which components apply and what condition they are in for your specific home.
Get matched in Franklin CountyFranklin County, by the numbers
268 severe weather events were recorded in Franklin County, Ohio 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 Franklin County, Ohio were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFranklin County, Ohio holds 595,469 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 52.8% of the occupied homes in Franklin County, Ohio (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules and Standards Behind Central AC Repair in Franklin County, Ohio22 sourced rules and standards
What happens when a contractor comes out for HVAC repair in Franklin 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.
Licensing and Legal Requirements in Franklin County, Ohio
An Ohio home construction services contract must include a copy of the supplier's certificate of insurance showing general liability coverage of not less than two hundred fifty thousand dollars.
In Ohio a home construction service means the construction of a residential building, including the repair, improvement, remodel or renovation of an existing structure, and does not include construction on a structure containing four or more dwelling units except for work on an individual dwelling unit within it.
A home construction service supplier in Ohio is defined as a person who contracts with an owner to provide home construction services for compensation and who maintains a general liability insurance policy of not less than two hundred fifty thousand dollars.
The Ohio construction industry licensing board issues state licenses to individuals as heating, ventilating and air conditioning contractors, refrigeration contractors, electrical contractors, plumbing contractors and hydronics contractors.
An Ohio board of county commissioners may accept a valid and unexpired Chapter 4740 license held by a heating, ventilating and air conditioning contractor toward its own licensing requirements for work on one-, two-, or three-family dwelling houses.
An Ohio board of county commissioners may adopt rules licensing heating, ventilating and air conditioning contractors who are not required to hold a state license under Chapter 4740.
In Ohio municipal law a specialty contractor includes heating, ventilating and air conditioning contractors, refrigeration contractors, electrical contractors, plumbing contractors and hydronics contractors.
An Ohio board of county commissioners may not register a specialty contractor who is required to hold a license under Chapter 4740 but does not hold a valid one.
An Ohio municipal corporation may not register a specialty contractor who is required to hold a license under Chapter 4740 but does not hold a valid one.
In Ohio building law a residential building means a one-family, two-family or three-family dwelling house and any accessory structure incidental to it, and does not include an industrialized unit, a manufactured home or a mobile home.
Ohio's contractor licensing chapter reaches only work on a construction project, and a construction project is defined to exclude residential buildings, so an HVAC contractor working on a one-, two-, or three-family dwelling in Ohio falls outside the state licensing requirement.
Violating Ohio's contractor licensing prohibition is a minor misdemeanor on a first violation and a misdemeanor of the fourth degree on subsequent violations.
Under Ohio law no person may act as or claim to be a type of contractor that Chapter 4740 licenses unless that person holds a license issued under that chapter.
In Ohio a home construction service supplier may not perform a home construction service costing twenty-five thousand dollars or more without entering into a written home construction services contract with the owner, unless the supplier and owner enter into a cost-plus contract.
Severe Weather Events in Franklin County
Stress from extreme weather accumulates inside HVAC equipment whether or not a storm causes visible damage. Franklin County's weather record is part of what a contractor reads when diagnosing why a central AC system is struggling.
268 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.