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A furnace repair in Bexar County starts with a question a contractor has to settle before anything else: what has this system actually been running against. 387 severe weather events were recorded in Bexar County, Texas between 2015 and 2024. At that rate, severe weather is a standing condition here, not an occasional disruption, and it shows up in the components a contractor opens. Heat exchangers, pressure switches, and draft inducers carry that load directly, and a diagnosis that skips the weather history risks misreading what caused the failure. Age and maintenance still explain plenty of failures, but they do not get to skip the line.
Furnaces in houses built this long ago have been swapped out, repaired, and patched by more than one contractor over the years, and what a unit shows when it is opened rarely matches what the nameplate suggests. Half the homes in Bexar County, Texas were built in 1990 or earlier (2020-2024 ACS 5-year). That history matters for repair work because a system of that vintage may run on components that carry long lead times or that a supplier no longer stocks at all. A contractor who can identify the part first, before quoting the job, is the one who can give you a price that holds.
The Parts of a Furnace a Contractor Checks First
The heat exchanger sits inside the furnace cabinet, usually in a utility closet, basement, or garage, and it is where combustion heat passes into the air stream. Cracks or corrosion here are a serious finding. The burner assembly sits just below it and is the first place a contractor looks when a furnace fails to fire or burns unevenly.
The blower motor and its fan wheel sit at the base of the cabinet and push conditioned air out through the supply plenum. The draft inducer, mounted at the top of the heat exchanger, pulls combustion gases toward the flue. The control board ties these components together, and a fault there can mimic failures in any one of them.
The drawing shows a typical furnace layout, and a licensed contractor determines which components apply to the specific unit and installation in your home.
Get matched in Bexar CountyBexar County by the numbers
387 severe weather events were recorded in Bexar 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 Bexar County, Texas were built in 1990 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesBexar County, Texas holds 820,780 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 58.8% of the occupied homes in Bexar County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Repair Rules on Record for Bexar County, Texas5 codes, standards & licensing rules
What Furnace Repair Looks Like in Bexar County
Non-weatherized gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized oil-fired furnaces manufactured on or after November 19, 2015 must reach 83.0 percent AFUE.
Mobile home gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized gas furnaces manufactured on or after December 18, 2028 must reach 95.0 percent AFUE, up from the 80.0 percent minimum that applies to units manufactured before that date.
Licensing and Legal Requirements in Bexar 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 Bexar County
Bexar County weather puts real stress on heating equipment, and how hard a furnace works over its life is shaped by local conditions. That load history is why weather data belongs on a page about repair.
387 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.