AC Repair, HVAC Replacement & Installation Services in Fort Mill, SC

For 99 years, GSM Services has provided AC repair, AC replacement, HVAC maintenance, and new heating & cooling system installation in Fort Mill, SC. Our certified technicians deliver fast, reliable service, quality workmanship, and honest, fair pricing. We're proud to have been voted Best Heating & Cooling Company for the past 10 years! We also offer insulation, duct cleaning, and crawlspace services to improve comfort, air quality, and energy efficiency. Enjoy easy booking, instant online quotes, and free service calls with any repair!

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Why Locals Choose GSM Services:

✅ Fast, Affordable & Reliable
✅ Licensed and Insured
✅ Locally Owned for 99+ Years
✅ Voted Best Heating & Cooling Company
✅ 100% Guaranteed Satisfaction
✅ Outstanding Warranties
✅ Unbeatable Financing for Any Budget
✅ FREE HVAC Service Calls with Repairs
✅ FREE System Quotes
✅ FREE Insulation, Crawlspace and Home Energy Audits

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How Much Does a New AC System Cost in Fort Mill, SC?

A new Air Conditioning system in Fort Mill, SC typically costs $8,000–$20,000+, depending on your home's size, system efficiency, ductwork, and installation requirements. Factors like square footage, insulation, and existing equipment can also impact pricing.

Get an instant estimate with GSM's free HVAC System Cost Calculator. Receive customized AC pricing and estimated monthly payment options for your Fort Mill, SC home before scheduling an appointment.

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Duct Cleaning & Air Conditioning System Prices in Fort Mill, SC

Get your free instant quote online in just 30 seconds!

HVAC INSTALLATION

DUCT CLEANING

DRYER VENT CLEANING

Heating & Cooling Services in Fort Mill, SC:

Crawl Space, Insulation, Generators & Other Home Services We Offer in Fort Mill, SC:

AC Repair in Fort Mill, SC

If your Air Conditioner isn’t working, trust GSM Services for fast, affordable AC repair in Fort Mill, SC. Our licensed HVAC technicians service all makes and models, provide expert solutions, and offer clear, upfront pricing with no hidden fees. We also include a free service call with any repair.

AC Replacement & Installation in Fort Mill, SC

Looking for a New Air Conditioning System? Our licensed HVAC installers in Fort Mill, SC are certified experts in energy-efficient heating & cooling systems that can lower your energy bills by up to 30%. We’ll walk you through the latest HVAC options and help you choose the right system for improved comfort, quieter operation, and cleaner indoor air. Book online today for a free, no-obligation consultation and quote!

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Certified Service for All Types of Heating & Cooling Systems

Central Heating & Air Conditioning Systems
Ductless Mini Splits
Package Systems
Heat Pump Systems
Gas furnaces
Oil furnaces
Electric Furnaces

HVAC Duct Cleaning Services in Fort Mill, SC:

Our duct cleaning services thoroughly clean your entire duct system—not just the air vents—to ensure optimal air quality and system efficiency. We start with a full inspection, checking for tears, leaks, or any issues that could affect performance. Our comprehensive cleaning service includes a special disinfectant spray treatment to leave your ducts fresh and sanitized. Get a free, instant online quote in seconds and breathe cleaner air with our professional duct cleaning services!

Insulation Services in Fort Mill, SC:

GSM Services is your trusted local insulation company in Fort Mill, SC. We provide high-quality, affordable home insulation for attics, walls, crawl spaces, basements, floors, garages and more. Our certified experts use various insulation types to fit your home and budget, helping reduce energy bills and improve comfort and air quality year-round. Experiencing uneven temperatures or high utility costs? Schedule your free insulation inspection today! We’ll assess current insulation, check for air leaks or moisture issues, and provide a custom, no-obligation quote for your home. Call or book online now!

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Photo Galleries From Fort Mill

TRUComfort installation

News & Events From from Fort Mill

Start 2017 with saving Energy, Money, & the Planet!

Home improvements are a great way to start off your new years resolution of "saving money". Take a look at your heating and cooling costs and have a Whole Home Energy Evaluation done.... [Read more]

Save Energy on Heating with This List

High energy bills can come as a surprise in the winter. In our service area, air conditioners see a lot more use than heaters. When temperatures drop, homeowners might feel relieved as bills start to lower as well-until the heater becomes more and more of a necessity.... [Read more]

More News & Events

Work Requests From Fort Mill, SC

Project Location: Fort Mill, SC
Need estimate on attic insulation.
Project Location: Fort Mill, SC
Need to upgrade 5 inches settled cellulose to r30-r40 in 1800 sq feet attic. And talk about sealing in order to qualify for duke power rebate. You were listed as one of thier contractors. Need a ballpark estimate to start with.
Project Location: Fort Mill, SC
Outside Ac unit is running , but not cooling the home . Also interested in possibly purchasing a new unit . 1- need Ac looked at 2- interested in a new unit
Project Location: Fort Mill, SC
Would like to set up an appointment for someone to come and look at our upstairs unit as it doesn't seem to be running properly.
Project Location: Fort Mill, SC
Reduce heat in attic to help preserve HVAC System. Also to insulate attic door and other insulation areas.
Project Location: Fort Mill, SC
I think the fan motor is going out in my AC unit.
Project Location: Fort Mill, SC
Would like to keep attic space cool and make an additional living space.
Project Location: Fort Mill, SC
Insulation for eve in finished room above garage. Desire to moderate the temperature in both winter and summer.
Project Location: Fort Mill, SC
Duke Energy referred me to you for a new AC install. I would like to speak with someone at my house about options and an estimate. Please contact me as soon as possible as I would like the install to be completed in the next few weeks. Thank you very much.
Project Location: Fort Mill, SC
Finishing my basement.
Project Location: Fort Mill, SC
Have bought this house about a month ago and would like to get all the duct work in attic replaced - thank you, noble
Project Location: Fort Mill, SC
I need to have the attic insulation evaluated.
Project Location: Fort Mill, SC
Our heating has a weird smell when we turn it on, and our upstairs loft and bathroom fans don't seem to be working
Project Location: Fort Mill, SC
AC seems to be not generating cold air Additional information: Date requested: 09/29/2017
Project Location: Fort Mill, SC
There is brown water stain around the air vent in our kitchen. Need diagnosis to identify where the leak is coming from. The house is a one story with an attic above.
Project Location: Fort Mill, SC
Looking to get an estimate for insulating a walk out basement
Project Location: Fort Mill, SC
Just bought house and want to schedule a tune up of hvac
Project Location: Fort Mill, SC
Air condition isn't working at optimal
Project Location: Fort Mill, SC
Looking to replace downstairs 3 ton AC unit. Looking for an estimate on cost.
Project Location: Fort Mill, SC
Looking for a quote to replace 2 AC units - one 2.5 ton unit and one 3 ton unit