Furnace Repair in Knoxville, TN
When your furnace goes down in East Tennessee, you need a technician who actually knows furnaces — not a general handyman with a multi-tool. Aire Care Mechanical specializes in gas furnace diagnostics, repair, and replacement throughout Knoxville and surrounding communities.
Mon–Fri 8am–5pm · Sat 8am–2pm · After-hours emergency service available
20+ Years
East Tennessee’s HVAC experts
Amana & Goodman
Top-tier equipment brands
Upfront Pricing
No hidden fees — ever
Emergency Service
Available after hours
Gas Furnace Specialists
Expert Furnace Repair — Done Right the First Time
A furnace failure in the middle of a Knoxville winter isn’t just inconvenient — for families with young children, elderly members, or pets, it can quickly become a safety issue. That’s why Aire Care Mechanical keeps fully stocked service trucks and prioritizes furnace calls across Knox County and East Tennessee. If you also need AC repair or are considering package units as an alternative system, we handle those too.
Our technicians don’t guess. Every furnace diagnostic starts with a thorough inspection of your heat exchanger, burners, ignition system, gas valve, and blower assembly. We find the root cause — not just the symptom — so you’re not calling us back for the same issue two weeks later.
We service and repair all major gas furnace brands, and we install Amana and Goodman equipment when replacement is the smarter long-term investment. Our honest assessment means we’ll tell you which path is right for your specific situation — even if it’s not the more expensive one.
Why Homeowners Choose Aire Care
10 Signs Your Furnace Needs Professional Attention
East Tennessee winters can be mild — or brutal. Don’t wait for a complete breakdown to discover your furnace has been struggling. If you’re also seeing cooling issues, check our AC repair page.
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No heat or weak heatIf your furnace is running but your home isn’t reaching temperature, the problem could be a faulty heat exchanger, dirty burners, a failing gas valve, or a blower motor issue.
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Yellow or flickering burner flameA healthy gas furnace flame is solid blue. A yellow, orange, or flickering flame is a warning sign of incomplete combustion — and potentially dangerous carbon monoxide production.
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Furnace cycles on and off rapidlyShort-cycling — where the furnace fires up and shuts down before completing a full heating cycle — is often caused by a tripped limit switch, dirty flame sensor, or airflow restriction.
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Unusual noises: banging, squealing, rattlingA loud bang on startup may indicate delayed ignition. Squealing points to belt or bearing wear. Rattling can mean loose panels or a cracked heat exchanger — which is a serious concern.
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Rising energy bills without explanationA furnace working harder than it should — due to age, dirty components, or a sizing mismatch — will show up immediately on your gas and electric bills.
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Soot or excessive dust around ventsBlack soot around your furnace or supply vents can indicate combustion problems. Excessive dust may signal a cracked heat exchanger allowing combustion gases into your living space.
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Pilot light keeps going outOn older furnaces, a repeatedly extinguishing pilot light usually points to a faulty thermocouple — an inexpensive fix, but one that requires a trained technician.
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Carbon monoxide detector triggeredNever ignore a CO alarm. Evacuate immediately and call for emergency service. A cracked heat exchanger is the most common cause of CO leaks in gas furnaces.
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Furnace won’t ignite at allModern furnaces use electronic ignition. If yours won’t fire at all, the issue may be a faulty ignitor, bad flame sensor, or a problem in the control board.
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System is over 15 years old and repairs are adding upOlder furnaces lose efficiency dramatically. If repair costs are climbing and the system is past its prime, replacement with Amana and Goodman equipment may be the better financial decision.
Furnace Repair or Replacement?
We’ll Give You the Honest Answer
One of the most common questions we get on furnace calls is: “Should I fix this thing or just replace it?” Our answer is always based on what’s actually in your best interest — not on what generates more revenue for us.
A useful guideline: if your furnace is under 10 years old and the repair cost is less than $500, repair usually makes sense. If the system is 15 years or older and the repair approaches or exceeds $800–$1,000, replacement with Amana and Goodman equipment typically delivers better long-term value — lower bills, fewer breakdowns, and warranty protection. Some homeowners in this situation also explore switching to a heat pump package unit system, which may suit their home’s layout.
We’ll walk you through the math honestly, explain what the repair involves, and give you both options in writing before you make any decision. No pressure. No upsell. Just a straight answer from people who’ve been doing this for over 20 years.
Important: If you smell gas, hear a continuous clicking from the furnace, or your carbon monoxide detector has triggered — leave the house immediately and call your gas utility and emergency services. Do not attempt to restart the system.
What to Expect on a Furnace Call
When our technician arrives at your East Tennessee home, here’s exactly what happens:
- Full furnace inspection — heat exchanger, burners, ignition, blower
- Carbon monoxide and combustion safety check
- Airflow and filter assessment
- Clear diagnosis with root cause identified
- Upfront repair quote — in writing, before work begins
- Replacement options presented if applicable
- 30-day warranty on completed repairs
Furnace Repair FAQs — Knoxville & East Tennessee
Answers to the questions we hear most from East Tennessee homeowners.
How much does furnace repair cost in Knoxville?
Furnace repair costs vary widely depending on the failed component. Simple fixes like a thermocouple or flame sensor replacement may run $100–$250. More involved repairs — heat exchanger, gas valve, or control board — can reach $400–$900. We quote upfront before any work begins. If you’re also curious about air conditioning repair costs, the same upfront pricing policy applies.
How long does a gas furnace last in East Tennessee?
A well-maintained gas furnace typically lasts 18–25 years in this climate. East Tennessee’s moderate winters are easier on furnaces than harsh northern climates. However, skipping annual maintenance, delaying repairs, and ignoring airflow problems all shorten system life significantly.
Can you service my furnace brand?
Yes. Our technicians are trained on all major residential gas furnace brands including Carrier, Lennox, Trane, Rheem, York, Goodman, Amana, Bryant, American Standard, and others. We service whatever is in your home.
What AFUE rating should I look for when replacing a furnace?
AFUE measures how efficiently a furnace converts gas to heat. Standard units run around 80% AFUE; high-efficiency models reach 96–98%. In Tennessee’s moderate winters, an 80% unit often delivers the best cost-to-performance ratio. We’ll help you calculate which makes financial sense for your home when we present your Amana and Goodman replacement options.
Should I consider a package unit instead of replacing my furnace?
It depends on your home. If you’re on a slab foundation without space for a split system’s air handler, a gas package unit or heat pump package unit is worth exploring — it combines heating and cooling in one outdoor cabinet. Visit our package units page to learn more about whether that system type fits your home.
Service Areas
We Serve All of East Tennessee
Aire Care Mechanical provides expert HVAC service throughout Knox County and the surrounding region. Click your city to learn more about local AC repair, furnace repair, and package units service near you.
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Upfront pricing, no pressure, expert service from East Tennessee’s trusted HVAC team.