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3148148455

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.

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Why us

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

Social proof

What Our Customers Say

5.0
professionalism

“He explained everything and made sure our new heat pump was ready for colder weather.”

5.0
honesty

“Thorough check of our furnace, AC, and heat pump without pushing upgrades.”

5.0
quality

“Knowledgeable, courteous, and on time. We will use them again.”

Got questions?

Frequently Asked Questions

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.

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Helpful Resources

Festus Ductless Mini-Split Repair & Install — HVAC


Estimated Read Time: 12 minutes

Hot upstairs, cold downstairs, and a utility bill that keeps rising? Our ductless mini-split services in Festus, MO give you ...

Where we work

Where We Work

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Pasadena Hills

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Old Monroe

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MO

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Grafton

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MO

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MO

Matson

MO

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IL

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Festus

MO

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MO

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MO

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Ballwin

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Ready when you are

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3148148455