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A contractor called out to repair a central AC system in Oldham County arrives with a particular expectation about what the equipment has been working against. 187 severe weather events were recorded in Oldham County, Texas between 2015 and 2024. At that rate, severe weather is a recurring feature of every cooling season here, and the components that absorb the hardest work reflect it. A compressor running through repeated stress events wears differently than one that has had quiet summers, and a contractor checking one here looks at the capacitor and condenser coil before moving to anything else.
Ductwork and wiring in a house this old were sized and routed for whatever system came first, and what replaced that system, and sometimes what replaced the replacement. Half the homes in Oldham County, Texas were built in 1967 or earlier (2020-2024 ACS 5-year). When a repair contractor opens a unit here, the components inside reflect that layered history: replacement parts that fit a mid-generation system sitting inside a cabinet original to an earlier one, or vice versa. Finding a match for what is actually in the unit takes research the invoice does not always show.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit sits outside the house, usually on a concrete pad along one wall, and it is where heat gets released. The indoor air handler or furnace blower sits inside, often in a closet, attic, or utility room, and it pushes conditioned air through the house. When a system stops cooling or stops running, these two units are where a contractor starts.
The refrigerant lines run between the two units, carrying the fluid that makes the whole exchange possible. The expansion valve and the evaporator coil sit at the indoor unit, and the contactor, capacitor, and compressor sit at the outdoor one. These components are the usual suspects when something has failed.
The drawing shows a typical layout, and a licensed contractor determines which parts apply to this particular house and system.
Get matched in Oldham CountyOldham County, by the numbers
187 severe weather events were recorded in Oldham County, Texas 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 Oldham County, Texas were built in 1967 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOldham County, Texas holds 776 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 73.6% of the occupied homes in Oldham County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Central AC Repair in Oldham County, Texas9 sourced rules and standards
What HVAC Repair Looks Like in Oldham 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 Oldham County, Texas
In Texas a person may not engage in air conditioning and refrigeration contracting unless that person holds a license issued under the state air conditioning and refrigeration contractor law.
Severe Weather Events in Oldham County
Weather puts hours on HVAC equipment. Every spike in heat, every hard storm, every stretch of punishing humidity asks more of a system than a mild week ever would, and what the climate does in this part of Texas shapes how hard local equipment has to work and how often it needs attention.
187 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.