Tell us about the job
Takes about a minute. No obligation.
On a furnace repair call in Buchanan County, a contractor starts with the burner, the heat exchanger, and the ignition system. Homes in Buchanan County, MO run heat about seven months a year, from October through April. That kind of sustained cycling loads those three components harder than anything else in the unit. Cracks in the heat exchanger and carbon buildup on the igniter both trace back to accumulated firing cycles, and a contractor who opens the furnace will find evidence of that history before they get to controls or secondary components.
Ductwork in houses this old has usually been modified more than once, and what those modifications left behind shows up the moment a contractor opens the furnace. Half the homes in Buchanan County, Missouri were built in 1964 or earlier (2020-2024 ACS 5-year). Heat exchangers in systems running through that many heating seasons crack along seam lines that only inspection under load will catch, and burner assemblies collect residue that changes how the flame sits. A contractor working on a repair here reads the condition of flue connections and heat shields as carefully as the failed part itself, because the failed part rarely failed alone.
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 it is where a contractor looks first when heat output drops or carbon monoxide is a concern. The burners feed into it directly, and when either the burners or the exchanger are the problem, the furnace either runs poorly or stops running.
The blower motor sits below the heat exchanger and pushes conditioned air into the supply side of the duct system. The inducer motor, the igniter, the flame sensor, and the control board all sit inside or on the cabinet itself, and each one can stop the furnace from starting or keep it from completing a full heating cycle.
The drawing shows the general layout of a furnace system, and a licensed contractor determines which components apply to the specific equipment and conditions in your home.
Find a contractor in Buchanan CountyBuchanan County, by the numbers
106 severe weather events were recorded in Buchanan 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 Buchanan County, Missouri were built in 1964 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesBuchanan County, Missouri holds 38,472 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 66.3% of the occupied homes in Buchanan County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Furnace Repair in Buchanan County, Missouri4 sourced rules & standards
What Furnace Repair Looks Like in Buchanan 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 Buchanan County
Extreme weather puts real load on furnaces, pushing equipment harder and shortening the time between service calls. How much of that pressure lands on homes in this area shapes what local repair work actually looks like.
106 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.