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A furnace running in this area has been working against a steady diet of severe weather, and the stress lands on specific parts: heat exchangers, ignitors, and blower motors all carry the load of repeated thermal cycling through rough conditions. 195 severe weather events were recorded in Alachua County, Florida between 2015 and 2024. At that rate, a contractor repairing a furnace here checks those components first, because wear on them tends to track the weather this county gets rather than the age of the unit alone. A system installed recently can show ignitor failure that an older system in a calmer area never would.
Furnaces in older houses carry a history that opens up the moment a contractor pulls the unit apart. Half the homes in Alachua County, Florida were built in 1988 or earlier (2020-2024 ACS 5-year). Equipment installed well after the original build has gone through its own cycles since then, and the question a technician is answering once the system is open is whether the worn component it needs still has a current part number. If the answer is no, the repair becomes a different job with a different price. That is what the age of the housing stock here puts on the table for furnace work.
The Parts of a Furnace a Contractor Checks First
The furnace itself sits in a utility room, basement, or closet and is the piece a contractor goes to first. Inside it, the heat exchanger and burner assembly are where most failures show up. A cracked heat exchanger, a failing igniter, or a burner that will not light cleanly are the faults that cut heat or trip a safety shutoff.
The blower motor pushes conditioned air into the duct system and draws return air back through the cabinet. Alongside it, the control board reads sensors and tells every other component when to act. When the board misfires or a sensor feeds it bad data, symptoms can look like almost any other fault, which is why a contractor reads the board early.
The drawing shows a typical furnace layout, and a licensed contractor determines which components apply and what condition they are in for your specific home.
Get matched in Alachua CountyAlachua County, by the numbers
195 severe weather events were recorded in Alachua County, Florida 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 Alachua County, Florida were built in 1988 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesAlachua County, Florida holds 127,731 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 54.1% of the occupied homes in Alachua County, Florida (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Behind Furnace Repair in Alachua County, Florida5 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 Alachua County, Florida
Florida requires a person to be certified or registered in order to engage in the business of contracting in the state.
Severe Weather Events in Alachua County
Weather puts real hours on HVAC equipment. When a furnace runs hard through temperature swings and storm-driven cold snaps, the parts that wear first are the ones that were already under strain, and getting them looked at is a local job.
195 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.