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A furnace repair quote here starts with the burner assembly and heat exchanger, because those are the parts that have been cycling longest. Homes in Alcorn County, MS run heat about seven months a year, from October through April. The ignition system fires and rests on that same schedule, and hairline cracks in the heat exchanger or a fouled igniter do not announce themselves until the system fails to light on a cold morning. Contractors working furnace repairs in this county pull and inspect the heat exchanger first, before the repair scope goes anywhere else.

Half the homes in Alcorn County, Mississippi were built in 1981 or earlier (2020-2024 ACS 5-year). A furnace running in a house from that era was almost certainly installed years after the house was built, and then possibly replaced again since. What that history produces, inside the cabinet, is a system whose heat exchanger, limit switches, and igniter may have no current equivalent at a supplier. A contractor here does open the unit before quoting a repair, because the bill turns on what that unit actually takes, and whether it ships.
The Parts of a Furnace a Contractor Checks First

The furnace itself sits in a basement, utility room, or closet and is the heart of the system. Inside it, the heat exchanger is the piece a contractor looks at closely during a repair call, because a crack or failure there is what stops warm air from reaching the rest of the house. The burners and igniter sit just below it, and when the furnace won't light or keeps shutting off, those are where a contractor starts.
The blower motor and fan assembly sit at the base of the furnace cabinet and push conditioned air out through the supply side of the system. The flue pipe runs from the top of the furnace up and out of the house, carrying combustion gases away. The control board ties all of it together, and a fault there can make a problem look like it belongs to almost any other part.
The drawing shows a general layout of the system, and a licensed contractor determines which parts apply and what condition they are in for your specific home.
Find a contractor in Alcorn CountyAlcorn County, by the numbers
52 severe weather events were recorded in Alcorn County, Mississippi 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 Alcorn County, Mississippi were built in 1981 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesAlcorn County, Mississippi holds 16,283 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 67.8% of the occupied homes in Alcorn County, Mississippi (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Furnace Repair in Alcorn County, Mississippi5 sourced rules & standards
What Happens When a Contractor Comes Out
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 Rules for HVAC Repair in Alcorn County, Mississippi
Mississippi licenses residential HVAC work at every tier and at any price: a subcontractor of any tier doing heating, ventilation or air conditioning work on a residential construction or improvement project must be licensed by the State Board of Contractors no matter the dollar amount.
Severe Weather Events in Alcorn County
Weather puts real hours on a furnace. The harder a system works to hold temperature through what Mississippi throws at a county, the sooner its parts need attention.
52 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.
