Heating System in Greater St. Louis
Need reliable heating help now? We service, repair, and replace heating systems with clear, flat-rate pricing and fast response. Air Comfort Service, Inc. is family-owned since 1969 and a Carrier Factory Authorized Dealer with multiple President's Awards. Serving the Greater St. Louis region, including St. Louis, St. Charles, and O'Fallon. As cooler weather approaches, schedule a system check to stay ready. Enjoy trusted work backed by a 4.9 rating from 2,124 reviews. Call or request your appointment today.
What can you expect to pay?
How customers feel about the bill, in their words.
Post-job survey · verified customers
What moves the final number.
Cost factors shown where available. All price ranges based on Air Comfort Service, Inc. job history.
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View all offersHeat exchanger replacement can cost $1,500 to $3,500 and often isn't economically viable on an older furnace. Air Comfort Service will provide a free second opinion and show you exactly what we find.
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Estimates are free!
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Contact us at 314-819-0028 or use our easy online service form.
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Why Choose Us
Carrier Authorized Dealer
Award-winning service
Decades of experience
Transparent flat-rate pricing
Top-rated reputation
What Our Customers Say
speed
“One call and we were warm again. Dependable, professional service.”
quality
“Excellent work, reasonably priced, and they take good care of you.”
performance
“The furnace holds the temp on the button and is so quiet.”
Heating system repair cost is determined after an on-site diagnosis because the failed part, labor time, and system type drive the price. We don’t publish flat rates, but Air Comfort Service, Inc. offers $55 off any service repair and provides transparent pricing with no hidden fees. Our team services homes across the St. Louis area, so we see everything from simple furnace ignitors to complex boiler controls; a stuck inducer can look like a bad board until we meter it out. If a unit has repeated failures or a major safety issue, like a cracked heat exchanger, replacement is usually the safer, smarter path; free estimates are available for new heating installations.
What most affects price:
- Component needed (ignitors, sensors, blower motors, control boards, valves, pumps)
- System type/age (furnace, boiler, heat pump, ductless)
- After-hours emergency vs. scheduled visit
- Warranty coverage and code-required corrections
Schedule a diagnostic visit so a technician can quote the exact repair before any work.
Updated: 2026-02-13
Need help in Saint Louis, MO? Call 3148148455 or book online.
Furnace replacement cost for homeowners varies by equipment and installation scope, and Air Comfort Service, Inc. confirms final pricing after an in-home evaluation. The biggest driver is properly sizing the furnace and choosing an efficiency level that fits your home and budget. If venting changes or duct fixes, or a new furnace cabinet are needed, that will add to the cost. Our team regularly handles required permits for installations across the St. Louis metro, which can affect project steps and cost. Free estimates are available for furnace installation and replacement. If your current unit is unsafe or breaking down often, replacement is usually the smarter long-term move; if it’s safe and only needs a small fix, repair or monitor instead.
Key factors that set the final price:
- Furnace capacity and efficiency rating
- Ductwork modifications or sealing needs
- Venting or flue upgrades and condensate handling
- Gas line, electrical, thermostat, or indoor air quality add-ons
Schedule an in-home assessment to receive a written, line-item estimate tailored to your home.
Updated: 2026-02-13
Need help in Saint Louis, MO? Call 3148148455 or book online.
Still have questions?
Have questions or need service? Contact our team today to discuss your needs, request a quote, or schedule an appointment.