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A furnace that has been running against routine severe weather accumulates wear on its heat exchanger, igniter, and blower components in ways that show up clearly when a contractor opens the unit. 132 severe weather events were recorded in Clark County, Indiana between 2015 and 2024. At that rate, severe weather is a standing condition for equipment in this county, and a contractor diagnosing a furnace problem here expects to find cumulative stress rather than a single point of failure. Filters clog faster. Blower motors work harder to compensate for pressure changes. The repair scope tends to be broader than homeowners expect.
Furnaces in a house this old have often been swapped out once or twice already, and what the opened unit contains rarely matches what the exterior suggests. Half the homes in Clark County, Indiana were built in 1982 or earlier (2020-2024 ACS 5-year). That history matters to a repair call because the generation of equipment common in this stock draws from a parts catalog that has narrowed considerably. A contractor who opens a heat exchanger or a control board here may find components still available, or may find that sourcing is the whole job.
The Parts of a Furnace a Contractor Checks First
The furnace itself sits in a basement, utility room, or closet and is the piece a contractor goes to first. Inside it, the heat exchanger is the part most likely behind a no-heat call: it carries combustion gases away from the living space, and a crack in it shuts the system down for safety. The burners, which light the gas and produce the heat the exchanger carries, are checked alongside it.
The blower motor sits at the base of the furnace cabinet and pushes conditioned air out through the supply side of the house. The flue pipe runs from the top or back of the unit to an exterior wall or chimney and carries exhaust out. The control board, mounted inside the cabinet, reads the thermostat signal and tells every other component when to run, making it a common stop when the furnace behaves erratically.
The drawing shows the general layout of these components, and a licensed contractor determines what applies to your specific system and home.
Find a contractor in Clark CountyClark County, Indiana, by the numbers
132 severe weather events were recorded in Clark 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 Clark County, Indiana were built in 1982 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesClark County, Indiana holds 55,049 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 74.7% of the occupied homes in Clark County, Indiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Furnace Repair in Clark County, Indiana4 rules & standards
What HVAC Repair Looks Like in Clark 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 Clark County
Heating equipment in Clark County works against whatever the local climate puts it through, and that workload shapes how often repairs become necessary. A furnace stressed by hard weather years accumulates wear faster, which makes the repair history of this area a practical reference point.
132 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.