Furnace Repair in Hazelwood
Get fast, fair pricing from licensed local pros. Typical Hazelwood cost: $70 – $225 installed.
- Flame sensor
- $70 – $225
- Igniter
- $125 – $400
- Blower motor
- $350 – $1.3k
- Control board
- $250 – $700
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Furnace repair cost by part.
Typical Hazelwood repair pricing including parts and labor. A diagnostic fee usually applies and is often credited toward the work.
Furnace repair costs in Hazelwood, Missouri, typically range from $65–$175 for a diagnostic visit, plus parts and labor. With a median home age of 57 years, many Hazelwood homes have older furnaces that may need more frequent repairs. Local labor rates and the need for a mechanical permit (required by Hazelwood or St. Louis County) can affect the final price. Most homes use natural gas heating, and the mixed-humid climate means moderate cooling demand, so a gas furnace with AC is a common system choice. Federal tax credits (25C) are available for qualifying high-efficiency equipment, but not for repairs.
- Diagnostic / service callOften credited toward the repair$65 – $175
- Flame sensor or thermocoupleCommon no-heat cause on gas units$70 – $225
- Hot-surface igniterFurnace clicks but won’t light$125 – $400
- Blower motorNo airflow / weak airflow$350 – $1,300
- Heat exchangerCracked exchanger often means replace$1,300 – $3,000+
* 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 Hazelwood
U.S. Census ACS- Households
- 10,138
- Homeowners
- 6,682
- 53% own
- Median home value
- $150,000
- Median income
- $55,111
- Median home built
- 1969
- Housing units
- 12,549
With a median home built in 1969, many Hazelwood 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 Hazelwood.
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 Hazelwood
Given Missouri’s mixed-humid climate and gas heating, high-seer2 ac + gas furnace is the sensible default for most Hazelwood homes. A pro can confirm the right size and system for your home with a load calculation.
Sources: Ameren Missouri Heating and Cooling / HVAC rebates · SEER2 North Region efficiency standards
What Hazelwood code requires
Installing or replacing an HVAC system in Hazelwood follows Missouri 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 minimum13.4 SEER2 (North)
Federal North-region minimum for new split-system AC. Higher tiers cut bills and unlock rebates.
- Load calculationRecommended
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—
Missouri has no statewide residential building/mechanical code, so permit and inspection requirements are set locally by each city or county.
Sources: Ameren Missouri Heating and Cooling / HVAC rebates · SEER2 North Region efficiency standards
Not sure which rules and rebates apply to your home?
A licensed Hazelwood 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 Hazelwood
Missouri heating is mostly gas, which shapes the money back:
- StateUp to $2,000 per qualifying air-source heat pump (up to $1,000 central AC, up to $500/ton mini-split)Ameren Missouri PAYS (Pay As You Save) air-source heat pump 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.
- Federal30% of cost, up to $600Federal 25C tax credit — central AC →
For a qualifying high-efficiency central air conditioner.
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, including Missouri.
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 Hazelwood, explained.
What Affects Furnace Repair Costs in Hazelwood?
Repair costs in Hazelwood vary based on the part needed—flame sensors ($70–$225) are more affordable than blower motors ($350–$1,300) or heat exchangers ($1,300–$3,000+). Older homes (median built 1969) may have harder-to-find parts or require additional labor. Permit fees and inspection requirements set by Hazelwood or St. Louis County add to the total. The type of furnace (gas vs. electric) and accessibility of the unit also influence labor time.
Common Furnace Repairs in Hazelwood
Flame Sensor Failure
A dirty or faulty flame sensor can cause the furnace to shut off after ignition. This is a frequent issue in older Hazelwood homes.
Igniter Problems
A worn igniter may not glow hot enough to light the gas, leaving the home without heat. Common in furnaces over 10 years old.
Blower Motor Malfunction
The blower motor circulates warm air. A failing motor can cause weak airflow or overheating, often due to age or lack of maintenance.
Furnace Repair FAQs — Hazelwood
Yes, a mechanical permit is typically required for major repairs or replacements in Hazelwood. Check with the city or St. Louis County building department for specific requirements.
Furnace Repair near Hazelwood
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