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A furnace repair in Union County almost always comes down to age and maintenance, not weather load. 32 severe weather events were recorded in Union County, Indiana between 2015 and 2024. At that rate, severe weather is an occasional event here rather than a steady operating condition, which means a contractor diagnosing a failed heat exchanger, a worn inducer motor, or a cracked igniter is looking first at how old the system is and how well it has been serviced. Weather is not what put most of these systems on the edge.
Half the homes in Union County, Indiana were built in 1970 or earlier (2020-2024 ACS 5-year). Furnaces installed in houses built that long ago have often been replaced once or twice since, but the units running now still sit inside original plenums, on original flue runs, and some of the older replacements use components whose parts supply has thinned considerably. When a contractor opens a failed furnace here, the first question is whether the heat exchanger, burner assembly, or control board it needs is still being made. If the part is discontinued, the repair closes and the scope changes entirely. Stock this old does not make that outcome certain, but it makes it common enough that a diagnosis here is not a formality.
The Parts of a Furnace a Contractor Checks First
The furnace itself sits in the basement, utility room, or crawl space and is the piece a contractor goes to first. Inside it, the heat exchanger is the part most worth attention during a repair call: cracks or corrosion there let combustion gases reach the living space. The burners, igniter, and flame sensor are close by, and any one of them can stop a furnace from firing.
The blower motor sits at the base of the furnace cabinet and pushes conditioned air into the supply side of the system. The flue pipe runs from the top of the furnace up and out of the house, carrying exhaust away. The thermostat on the wall is the control point, and a contractor checks it early because a wiring or calibration fault there can mimic a furnace failure.
The drawing shows a typical furnace layout, and a licensed contractor determines which components apply to the specific equipment and installation in your home.
Find a contractor in Union CountyUnion County, Indiana, by the numbers
32 severe weather events were recorded in Union 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 Union County, Indiana were built in 1970 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesUnion County, Indiana holds 3,255 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 79.8% of the occupied homes in Union County, Indiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Behind Furnace Repair in Union County, Indiana4 rules & references
What HVAC Repair Looks Like in Union 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.
Severe Weather Events in Union County
Hard weather puts real hours on a furnace. Repair demand in Union County tracks local conditions, and those conditions are worth seeing clearly before assuming a problem is age or use alone.
32 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.