Best Furnace Repair Companies in Chattanooga, TN
What to look for in Furnace Repair in Chattanooga
Furnace repair is gas-and-combustion work, so credentials matter more than they do for AC. NATE certification and EPA 608 are the baseline. Heat-exchanger inspection in particular is the difference between a $200 service call and a CO-leak risk that puts a family in the hospital.
- Furnace repair specialization. Provider lists furnace repair as a primary service with diagnostic capabilities (igniter, flame sensor, gas valve, pressure switch, blower).
- NATE-certified technicians. Furnace work requires gas-handling competence in addition to electrical and refrigeration. NATE certification confirms third-party training.
- Emergency response advertised. No-heat in winter is an emergency. A provider that publishes their response window for after-hours furnace calls indicates they take the seasonal urgency seriously.
Verify before you book
- EPA 608 certification in the federal registry (we accept self-claimed) — ask the tech to show their card.
- Heat exchanger inspection methodology — some providers do visual-only, others use camera scopes. Ask before scheduling.
- Carbon monoxide detector pricing in any install quote — should always be itemized.
Furnace Repair in Chattanooga: NATE certification + gas safety
Furnace repair is gas + combustion work — credentials carry more weight than for AC. NATE certification and EPA 608 are the baseline. Here is what each of the 2 providers below publishes: Verify your state's HVAC contractor license through the state licensing board before paying a deposit.
Top picks
Metro Plumbing, Heating & Air★ Best for Furnace Repair
Furnace Repair score: 3.7
Vouched Score: 80/100
Driven by: 24/7 Emergency
- Emergency: 24/7
- Flat-rate: ✓
- Years: 35+
Google 4.8★ (4,395+)Yelp 2.3★ (45+)
- Emergency: 24/7
- Flat-rate: ✓
- Years: 25+
Google 4.8★ (1,785+)Yelp 3.2★ (9)
Typical Furnace Repair costs in Chattanooga, TN (2026)
Last updated
Estimated ranges for Chattanooga, TN. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| Furnace repair | $120–$730 |
| Ignitor or flame sensor replacement | $160–$405 |
| Heat exchanger inspection (CO safety check) | $120–$285 |
| Heat exchanger replacement (repair-vs-replace inflection) | $1,200–$2,850 |
See how Chattanooga compares to 90+ US cities: HVAC Cost Index →
Why Chattanooga, Tennessee's humidity and hillside homes change how you think about "HVAC"
Chattanooga's hot, humid summers and steep hills increase cooling loads and make duct routing and attic ventilation more challenging. Homeowners seeking the best HVAC companies in Chattanooga, TN should prioritize contractors who handle humidity control, slope-aware ductwork, and local permit navigation.
Practical Chattanooga "HVAC" answers: permits, warranty length, emergency response and service areas
- When is a furnace problem an actual emergency vs. a next-day call?
- Carbon-monoxide alarm, smell of gas, or visible cracks in the heat exchanger → emergency. No-heat in sub-freezing weather is urgent but rarely safety-critical. Most no-heat calls are igniter, flame sensor, or gas valve — same-day fixable.
- What's the difference between a flame-sensor clean ($120) and heat-exchanger replacement ($1,500+)?
- Flame sensors clog with combustion residue and stop signaling the gas valve — quick clean or swap. Cracked heat exchangers leak CO into your home airflow and require exchanger replacement (often impractical) or full furnace replacement. The tech's CO meter reading decides which one you're facing.
- Do Chattanooga HVAC projects over $25,000 require a CMC‑C mechanical license?
- Yes. Projects with combined materials and labor above $25,000 require a Tennessee CMC‑C mechanical contractor license issued by the Tennessee Board for Licensing Contractors. Homeowners should ask to see the contractor's current CMC‑C number and verify it with state licensing records. For larger commercial scopes, request written evidence of the board-issued license and any sub‑contracting arrangements before signing a contract.
- When is the busiest season for Chattanooga HVAC companies and how does that affect scheduling?
- Chattanooga sees peak demand during hot, humid summer months, which increases lead times for repairs and replacements. Book preventive maintenance before late spring to avoid summer backlogs. For time-sensitive work, confirm expected arrival windows and ask whether the provider offers emergency or priority scheduling during peak season.
- How do I find a mini‑split specialist experienced with Chattanooga humidity and steep‑lot homes?
- Look for technicians with manufacturer mini‑split dealer status, NATE or comparable certifications, and documented mini‑split installations in hillside or split‑level homes. Request references and photos of past projects that show outdoor unit siting and condensate management on sloped lots. A specialist should explain zoning, condensate routing, and humidity control strategies for Chattanooga conditions.
- How do I get a quote from these HVAC companies?
- Submit one request on this page and we send it to the vetted HVAC pros in Chattanooga, TN listed here. They send quotes back — no obligation.