Furnace Repair in Key West
Get fast, fair pricing from licensed local pros. Typical Key West cost: $75 – $250 installed.
- Flame sensor
- $75 – $250
- Igniter
- $150 – $425
- Blower motor
- $375 – $1.4k
- Control board
- $300 – $750
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Furnace repair cost by part.
Typical Key West repair pricing including parts and labor. A diagnostic fee usually applies and is often credited toward the work.
Furnace repair in Key West is uncommon because most homes rely on heat pumps for heating. However, if you have a furnace, repair costs typically range from $75 for a flame sensor to over $3,400 for a heat exchanger, plus a $70–$200 diagnostic fee. Labor rates reflect the local median income of $80,828, and all repairs must comply with the Florida Building Code, including high-wind tie-downs for outdoor units. Given the hot-humid climate, a heat pump is the recommended system, but for existing furnaces, repairs are still necessary.
- Diagnostic / service callOften credited toward the repair$70 – $200
- Flame sensor or thermocoupleCommon no-heat cause on gas units$75 – $250
- Hot-surface igniterFurnace clicks but won’t light$150 – $425
- Blower motorNo airflow / weak airflow$375 – $1,450
- Heat exchangerCracked exchanger often means replace$1,450 – $3,400+
* A cracked heat exchanger is a safety issue — on an older furnace, replacement is usually the call.
Pricing reviewed · Local data from U.S. Census ACS
HVAC systems in Key West
U.S. Census ACS- Households
- 10,431
- Homeowners
- 5,160
- 36% own
- Median home value
- $814,200
- Median income
- $80,828
- Median home built
- 1968
- Housing units
- 14,482
With a median home built in 1968, many Key West AC and furnace systems are at or past their 12–15 year lifespan — a common reason replacements spike here.
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What’s different about Key West.
Generic cost pages skip the things that actually decide your price and which system fits here — local code, climate, and the money you can claim back.
Recommended unit for Key West
Given Florida’s hot-humid climate and heat-pump heating, high-seer2 heat pump is the sensible default for most Key West homes. With a long, hard cooling season here, stepping up the SEER2 tier pays back through lower summer bills. A pro can confirm the right size and system for your home with a load calculation.
Sources: Duke Energy Florida HVAC Replacement Rebate · SEER2 Southeast Region Standards · EIA Florida State Energy Profile
What Key West code requires
Installing or replacing an HVAC system in Key West follows Florida rules under the state mechanical code. Here’s what applies statewide:
- PermitRequired
Mechanical permit pulled by your licensed HVAC contractor; covers equipment, refrigerant, and the electrical disconnect.
- SEER2 minimum14.3 SEER2 (Southeast, <45k BTU)
Federal Southeast-region minimum for new split-system AC. Higher tiers cut bills and unlock rebates.
- Load calculationRequired (Manual J)
Sizing by load calc — not rule of thumb — prevents an oversized unit that short-cycles and never dehumidifies.
- RefrigerantR-454B / R-32 (R-410A phased down 2025+)
- Good to know—
Florida Building Code requires hurricane/high-wind tie-downs and anchoring for outdoor condenser/heat-pump units.
Sources: Duke Energy Florida HVAC Replacement Rebate · SEER2 Southeast Region Standards · EIA Florida State Energy Profile
Not sure which rules and rebates apply to your home?
A licensed Key West pro will walk you through code, the right unit, and what you can claim back — in one quick call.
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Money back in Key West
Florida heating is mostly heat-pump, which shapes the money back:
- StateUp to $1,000 (heat pump/strip-heat upgrade; $300 AC, $500 heat-pump upgrade)Duke Energy Florida HVAC Replacement Rebate →
State or utility program — verify eligibility before you buy.
- State$200 instant credit (SEER2 15.3+ via participating contractor)FPL High-Efficiency AC/Heat Pump Instant Rebate →
State or utility program — verify eligibility before you buy.
- Federal30% of cost, up to $2,000Federal 25C tax credit — heat pump →
For a qualifying ENERGY STAR heat pump meeting the CEE efficiency tier. Claimed on your federal return.
The federal 25C tax credit (30%, up to $2,000 for a qualifying heat pump and up to $600 for a high-efficiency central AC) applies in every state.
Comfort back in three steps.
- 1
Tell us what’s wrong
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- 2
Get matched with a local pro
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- 3
Repair or replace, fast
Your pro confirms the price on-site and gets your comfort back. Most jobs done in a few hours.
Furnace Repair in Key West, explained.
Why Furnace Repair Costs Vary in Key West
Repair costs depend on the part needed—flame sensors ($75–$250) and igniters ($150–$425) are more affordable, while blower motors ($375–$1,450) and heat exchangers ($1,450–$3,400+) are higher. Labor rates are influenced by the local median income and the need for licensed technicians. Florida requires a mechanical permit for furnace work, adding to the cost. Additionally, the hot-humid climate means furnaces are used less, so parts may be harder to source, potentially increasing prices.
Common Furnace Issues in Key West
Flame sensor failure
A dirty or faulty flame sensor can cause the furnace to shut off after ignition. This is a common issue in older systems (median home built 1968).
Igniter problems
The igniter may wear out over time, especially in furnaces that are rarely used. Replacement costs $150–$425.
Blower motor malfunction
In the humid climate, blower motors can fail due to moisture or dust buildup. Repair costs $375–$1,450.
Furnace Repair FAQs — Key West
Yes, Florida requires a mechanical permit for furnace repair. Your contractor should pull the permit and ensure compliance with the Florida Building Code, including high-wind tie-downs for outdoor units.
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