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The burner and heat exchanger on a furnace in this county do not get much rest. Homes in New Madrid County, MO run heat about seven months a year, from October through April. Across those months, the ignition system fires and the heat exchanger expands and contracts on every cycle, and that mechanical fatigue is what a contractor is measuring when they pull the cabinet. Cracks in a heat exchanger, a worn ignitor, a burner that misfires under load: these are the repairs that show up here with regularity, and they show up because the parts earned them.
Ductwork and wiring in a house this old have outlasted more than one furnace already. Half the homes in New Madrid County, Missouri were built in 1975 or earlier (2020-2024 ACS 5-year). What a contractor opens up in stock like this is a system that may be running on components two or three product generations behind the current catalog, and part availability decides the repair scope before labor or anything else does. If a replacement part is discontinued, the contractor's finding changes the job entirely.
The Parts of a Furnace a Contractor Checks First
The heat exchanger sits at the core of the furnace cabinet in the basement or utility room and is the piece a contractor looks at closely during any repair call. Cracks or failures there affect both heating and air quality. The burner assembly sits just below it and is the first thing checked when the furnace fails to ignite or runs unevenly.
The blower motor and its fan wheel sit at the base of the cabinet and push conditioned air into the supply side of the duct system. The control board, mounted inside the cabinet door, is the piece that tells every other component when to run. The flue pipe runs from the top of the furnace up and out of the house, and a contractor checks it whenever combustion or venting problems are suspected.
The drawing shows a general layout of these components, and a licensed contractor determines what applies to your specific system and installation.
Get matched in New Madrid CountyNew Madrid County, by the numbers
105 severe weather events were recorded in New Madrid County, Missouri 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 New Madrid County, Missouri were built in 1975 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesNew Madrid County, Missouri holds 7,876 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 64.2% of the occupied homes in New Madrid County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Furnace Repair in New Madrid County, Missouri4 sourced rules and standards
What HVAC Repair Looks Like in New Madrid 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 New Madrid County
Hard weather puts furnaces under real load: cold snaps, power surges, and pressure swings all push equipment toward its limits faster than ordinary use does. How often that happens in New Madrid County shapes how much repair work the furnaces here actually need.
105 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.