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
Trust Air Comfort Service, Inc. for expert HVAC maintenance ensuring your comfort with professional care.
Trust Air Comfort Service, Inc. for all your heating, cooling, and insulation transformations—experience the 'Before' to 'After' excellence today.
Experience exceptional heating system services with Air Comfort Service, Inc. that ensure your comfort year-round.
Active coupons & redemption details.
View all offersFREE Quote
- Same-Day Water Heater Installation Availability
Call 314-819-0028
Estimates are free!
Ask one of our technicians for their insight the next time you make a service call or contact us to make an appointment with one of our estimators.
FREE Estimates!
- SAME-DAY APPOINTMENTS — OPEN 24 HOURS
- 24/7 Availability
Contact us at 314-819-0028 or use our easy online service form.
Why Choose Us
Carrier Authorized Dealer
Certified Carrier Factory Authorized Dealer
Award-winning service
Carrier President's Award recipient
Decades of experience
Serving local homeowners since 1969
Transparent flat-rate pricing
Upfront estimates, no surprise charges
Top-rated reputation
4.9 rating from 2,124 reviews; A+ BBB
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.
Crystal City
MO
Bayless
MO
Kinloch
MO
Pasadena Hills
MO
Old Monroe
MO
Portage Des Sioux
MO
Pacific
MO
Grafton
IL
Bethalto
MO
Wentzville
MO
Cedar Hill
MO
Lakeshire
MO
Sappington
MO
Wood River
MO
Glendale
MO
Glencoe
MO
Maryville
IL
North Riverfront
MO
Herculaneum
MO
Wildwood
MO
St Louis Hills
MO
Lewis Place
MO
Eureka
MO
Mascoutah
IL
Troy
MO
Augusta
MO
Edwardsville
IL
Treloar
MO
Grubville
MO
Pasadena Park
MO
Penrose
MO
St. Paul
MO
Holstein
MO
Marthasville
MO
Bel Nor
MO
Concord Hill
MO
Foristell
MO
Cottleville
MO
Grover
MO
Imperial
MO
Manchester
MO
St. Ann
MO
Black Walnut
MO
Fenton
MO
West Alton
MO
Dellwood
MO
Calverton Park
MO
Baden
MO
Moscow Mills
MO
Alton
IL
Winchester
MO
Green Park
MO
Richmond Heights
MO
Aspenhoff
MO
Pagedale
MO
Maplewood
MO
Ellisville
MO
South Shore
MO
Gray Summit
MO
Jennings
MO
Matson
MO
O'Fallon
IL
The Hill
MO
Webster Groves
MO
Kings Oak
MO
Festus
MO
Byrnes Mill
MO
St. Peters
MO
Normandy
MO
Crystal Lake Park
MO
Central West End
MO
Clifton Heights
MO
Orchard Farm
MO
O'Fallon
MO
Weldon Spring
MO
Columbia
IL
Kirkwood
MO
Moline Acres
MO
Defiance
MO
University City
MO
Breckenridge Hills
MO
Smithton
IL
Clayton
MO
Black Jack
MO
East Alton
IL
Ferguson
MO
Warson Woods
MO
Antonia
MO
Bellefontaine Neighbors
MO
Winfield
MO
Berkeley
MO
Ballwin
MO
Josephville
MO
Woodson Terrace
MO
Frontenac
MO
West End
MO
Boschertown
MO
Pickney
MO
Labadie
MO
Mehlville
MO
Brentwood
MO
Benton Park
MO
Harley Hills
MO
Barnhart
MO
High Ridge
MO
Union
MO
Washington
MO
Florissant
MO
Bevo Mill
MO
Cappein
MO
Dardenne Prairie
MO
Crestwood
MO
Huntleigh
MO
Gilmore
MO
Bridgeton
MO
Grantwood Village
MO
Olivette
MO
Seeburger
MO
Hopewell
MO
St. Louis
MO
Fairground
MO
New Melle
MO
Fairview Heights
IL
Belleville
IL
Ville Ridge
MO
Shrewsbury
MO
Vinita Park
MO
Godfrey
IL
Hilsboro / Mapaville
IL
Hazelwood
MO
New Haven
MO
North Woods
MO
Glen Carbon
IL
Town and Country
MO
Allenton
MO
Freeburg
IL
Pine Lawn
MO
Harvester
MO
Arnold
MO
Soulard
MO
Cool Valley
MO
Creve Coeur
MO
Waterloo
IL
Machens
MO
Valley Park
MO
Wellston
MO
Wright City
MO
Robertsville
MO
Earth City
MO
Velda Village
MO
McKinley
MO
Weldon Spring Heights
MO
Affton
MO
Dittmer / Morse Mill
MO
Mount Pleasant
MO
Kampville
MO
Overland
MO
Maryland Heights
MO
Sunset Hills
MO
Rock Hill
MO
Spanish Lake
MO
Edmundson
MO
St. George
MO
House Springs
MO
Lake St. Louis
MO
Ladue
MO
Hillsdale
MO
Kimmswick
MO
Riverview
MO
Flint Hill
MO
St. John
MO
Bel Ridge
MO
Catawissa
MO
Pevely
MO
St. Charles
MO
Airport
MO
Des Peres
MO
Country Club Hills
MO
Chesterfield
MO
Sycamore Hills
MO
Columbus Square
MO
Oakland
MO
Oakville
MO
Lemay
MO
Warrenton
MO
Dutzow
MO