AC Repair, HVAC Replacement & Installation Services in Dallas, NC

For 99 years, GSM Services has provided AC repair, AC replacement, HVAC maintenance, and new heating & cooling system installation in Dallas, NC. Our certified technicians deliver fast, reliable service, quality workmanship, and honest, fair pricing. We're proud to have been voted Best HVAC Company in Gaston County for the past 10 years! We also offer insulation, duct cleaning, and crawlspace services to improve comfort, air quality, and energy efficiency. Enjoy easy online booking, instant 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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Duct Cleaning & AC System Cost in Dallas, NC

Need HVAC or duct cleaning? Get your free instant quote online in just 30 seconds!

HVAC INSTALLATION

DUCT CLEANING

DRYER VENT CLEANING

How Much Does a New AC System Cost in Dallas, NC?

A new Air Conditioning system in Dallas, NC 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 Services' free HVAC System Cost Calculator. Receive customized AC pricing and estimated monthly payment options for your Dallas, NC home before scheduling an appointment.

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Heating & Cooling Services in Dallas, NC:

Crawl Space, Insulation, Generators & Other Home Services We Offer in Dallas, NC:

AC Repair in Dallas, NC

If your Air Conditioner isn’t working, trust GSM Services for fast, affordable AC repair in Dallas, NC. 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 Dallas, NC

Looking for a New Air Conditioning System? Our licensed HVAC installers in Dallas, NC 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 Dallas, NC:

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 Dallas, NC:

GSM Services is your trusted local insulation company in Dallas, NC. 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 Dallas

Finished project

Crawl Space Encapsulation Completed

News & Events From from Dallas

Is a wifi thermostat right for your home?

Do you need a wifi thermostat in your home? How much does a wifi thermostat cost? What makes a wifi thermostat smart? How much money can you save with a wifi thermostat?.... [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 Dallas, NC

Project Location: Dallas, NC
My AC is not working like it should. Came home yesterday to my house 78 degrees, it was set for 73. It was blowing out but not cool air. Changed my filter. When I woke up this AM it had came down to 75 degrees. Thanks
Project Location: Dallas, NC
You do my every 6 month service. My indoor part of my ac is leaking water so it's off and I have no ac. I want to replace my whole heating and air system so that it's all outside. It's a 4 ton unit and you have all the info on it. I need a cost please
Project Location: Dallas, NC
Tune up/system service for summer
Project Location: Dallas, NC
Estimate on Geothermal Heat Pump Installation
Project Location: Dallas, NC
My outside unit is old and has been going out. I've had a lot of work done on it over the years, but I feel it is time to replace the unit. I can't afford to pay upfront and was wondering if you have financing available?
Project Location: Dallas, NC
Hello, recently I had another business come and replace a fan motor and blade on an HVAC unit. It is now been making a very loud noice when turned on. The other business said they tried everything to quiet it down but they couldn't stop it or make it quieter. How much does it cost to come and look at the unit?We do need to replace our units they are 20 years old but I am unsure we can afford it right now. Thank you.
Project Location: Dallas, NC
Coils need to be cleaned, AC much cooler downstairs than up. Additional information: Date requested: 05/25/2020
Project Location: Dallas, NC
Looking to get a mini split system installed
Project Location: Dallas, NC
I just wanted to get a quote for duct cleaning for single story house. 10 vents, 1 return , was told that there are 3 main ducts under house instead of one main with ducts branching off. Please email me with a quote. Thank you
Project Location: Dallas, NC
Schedule a pre-paid cooling precision tune-up
Project Location: Dallas, NC
Generac full home generator assessment, quote, installation & service.
Project Location: Dallas, NC
Moisture and water intrusion in my crawl space
Project Location: Dallas, NC
I was interested in obtaining an estimate for maintenance for my a/c unit. As of right now, I do not have it serviced regularly but would like to if it is not too expensive.
Project Location: Dallas, NC
2 items. At the moment, my air is not functioning very well - may be low on freon and needing a recharge, at least it feels that way. Also, I'd like to get an estimate on a new heat pump split system. My current system is 20+ years old so it's way past time. Probably won't need new duct work, but it's possible they would need to be sealed up some. Thanks.
Project Location: Dallas, NC
We just bought a home and would like to have the hvac serviced to make sure it runs well through the summer.
Project Location: Dallas, NC
Our utilities bill is too high and want to reduce it.
Project Location: Dallas, NC
No heat. May be self-inflicted. Tried to replace the thermostat and now neither heat or a/c will come on. Rudd heat pump / ac unit less than 1 year old. Can we get service today? Tenants will need heat tonight. Thanks!
Project Location: Dallas, NC
Like to know that cost of duct cleaning
Project Location: Dallas, NC
Follow up Inquiry for crawlspace rennovation. Checking in again about pricing options. We've spoken previously about these matters.