Ductless Mini-Split in Greater St. Louis Area
Get efficient, room-by-room comfort with ductless mini-split systems installed by local pros. We are a family-owned HVAC team serving the Greater St. Louis area, including St. Louis, St. Charles, and Belleville. Carrier Factory Authorized, A+ BBB rated, and trusted with a 4.9 rating from 2,124 reviews. Expect flat-rate pricing, permitted workmanship, and clean installs. Beat summer heat and be ready for winter with a free estimate. Schedule now.
Why Choose Us
Carrier Authorized Dealer
Factory Authorized; multiple President's Awards
Since 1969, family-owned
Serving the St. Louis metro since 1969
Transparent flat-rate pricing
Upfront quotes and free second opinions
Licensed and permitted work
We pull required permits and file warranty paperwork
Top-rated local service
4.9 rating from 2,124 reviews; A+ BBB
What Our Customers Say
professionalism
“He explained everything and made sure our new heat pump was ready for colder weather.”
honesty
“Thorough check of our furnace, AC, and heat pump without pushing upgrades.”
quality
“Knowledgeable, courteous, and on time. We will use them again.”
A mini split that suddenly stops blowing cold air usually has an airflow, settings, or refrigerant problem. The most common cause is a clogged indoor filter or a refrigerant leak that lets the indoor coil get too cold to absorb heat. Other triggers include the unit being in Dry/Heat mode, a frozen coil from low airflow, a blocked outdoor condenser, or a failed fan or sensor. A quick tech insight: when the indoor fan runs but air feels room‑temperature and the outdoor unit is silent, the outdoor section likely isn’t being told to start. Our team services ductless systems across the St. Louis area and often sees these exact patterns in Ballwin homes during weather swings.
Try these fast checks:
- Confirm mode is Cool and setpoint is at least 3–5°F below room temp.
- Clean or replace the indoor filters.
- Clear leaves or lint from the outdoor unit’s coil and keep 12–24 inches open.
- Look for frost on the indoor coil and let it thaw before retrying.
If airflow and settings look right or you see ice, turn the unit off and schedule a professional to test refrigerant, electrical, and sensors.
Updated: 2026-05-01
Need help in Ballwin, MO? Call 3148148455 or book online.
Mini split repair pricing varies by the problem and is confirmed after an on‑site diagnosis. Most costs are driven by the failed part and the labor needed to access and test indoor and outdoor components, plus any refrigerant handling if there’s a leak. A technician will assess part availability, unit age, and whether the issue is isolated to one head or affects multiple zones. Our technicians regularly service the wider St. Louis and St. Charles area, which helps us spot patterns like a simple sensor fault presenting as a full system failure. We are available 24/7 in case of an emergency.
- Small items (like a thermistor, float switch, or drain cleaning): typically a straightforward repair.
- Refrigerant leak find/repair and recharge: more involved due to pinpointing and handling requirements.
- Major failures (compressor or main control board) on older units: compare repair vs replacement.
- Intermittent error codes: start with diagnostic and monitor after corrections.
Schedule a diagnostic visit to receive a firm, written quote before any work.
Updated: 2026-07-01
Need help in Saint Charles, MO? Call 3148148455 or book online.
Replacing a ductless mini-split has no one-size price; Air Comfort Service, Inc. gives a firm quote after an in-home evaluation. The biggest swing comes from system size and how many zones you need. Efficiency level, install complexity, and any permit fees also matter. When multiple major components fail or comfort suffers across zones, replacement is usually smarter; a single head or control fault often favors repair. A quick load check avoids oversizing and extra cost. We serve the St. Louis area, including Defiance, with transparent, no-hidden-fee quotes.
Key factors that set the final price:
- Number of indoor heads and total capacity
- Line-set length and wall/ceiling penetration needs
- Electrical upgrades and condensate drainage setup
- Brand, inverter tech, and cold-climate features
- Permit and inspection fees in your municipality
Schedule an in-home assessment to confirm sizing and receive a written quote you can compare.
Updated: 2026-02-13
Need help in Defiance, MO? Call 3148148455 or book online.
Ductless mini split installation pricing is finalized after an on-site evaluation because system design and site conditions drive the total cost. Most of the price usually comes from how many zones you need and how the refrigerant lines can be routed through the home. Our team frequently installs ductless systems in the St. Louis area, so we plan for local code requirements and permitting from the start. We provide transparent, itemized pricing with no hidden fees.
- Equipment efficiency and capacity: higher SEER2 and larger BTUs cost more but can lower energy use.
- Mounting choices: wall mounts vs. ceiling cassettes or floor consoles affect labor.
- Electrical work: adding a 240V circuit or panel upgrades changes the budget.
- Permits and inspections: required in many municipalities; we pull the permits and coordinate inspections. Schedule an in-home assessment to receive an exact quote tailored to your home.
Updated: 2026-02-13
Need help in Earth City, 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
