Milwaukee’s Trusted Heating Contractor for Repairs and Installation
When winter temperatures drop in Milwaukee, WI, you need a heating system you can count on to keep your home warm and safe. At GCS Heating and Cooling, we provide expert heating repair, installation, and replacement services designed to deliver long-lasting comfort and efficiency. With over 17 years of experience and a reputation built on good customer service, GCS is the name homeowners trust for all their heating needs.
As a licensed and insured HVAC contractor and a veteran-owned business registered with the Wisconsin Department of Veterans Affairs, we bring a level of integrity, professionalism, and craftsmanship that stands out in every project. From emergency furnace repairs to high-efficiency system installations, our goal is simple—to keep your home comfortable while providing the best value and service in the industry. Contact us for a free estimate!
Your home’s heating system plays a critical role in maintaining comfort and safety through Wisconsin’s coldest months. That’s why GCS offers a complete range of heating services tailored to fit your system’s needs and your home’s layout. Our experienced technicians are trained and EPA certified to work with a variety of heating systems and brands. Our heating services include:
Furnace Repair, Replacement
& Installation
Boiler Services &
Hydronic Heating
Heat Pump
Installation & Repair
Mini Split
Systems
Emergency Heating
Repair Services
Heating System Upgrades & Replacements
We work with trusted brands such as Goodman, Amana, Coleman, Bryant, and Carrier to ensure quality, durability, and performance you can rely on for years to come.
Furnace Repair and Installation Services
A dependable furnace is essential during Wisconsin winters. If your system isn’t heating evenly, is making strange noises, or is driving up your energy bills, it may be time for a professional inspection.
At GCS, we specialize in diagnosing and repairing all types of furnaces — gas, electric, and high-efficiency models. Our technicians take the time to find the root cause of any issue, ensuring that repairs are completed correctly and safely the first time.
If your furnace is beyond repair, we also provide new furnace installation and replacement services. We’ll help you select the right model for your home, focusing on energy efficiency, performance, and budget. With a proper installation from our skilled technicians, your new furnace will operate at peak efficiency for years to come.
Heat Pumps and Mini Split Systems
Looking for a versatile and energy-efficient solution to heat your home? Heat pumps and ductless mini-split systems are becoming increasingly popular among homeowners who want comfort and savings in one system.
At GCS, our team installs and services heat pumps and mini splits designed to provide efficient heating in winter and cooling in summer. These systems are ideal for homes without ductwork or for adding heating to specific areas such as garages, additions, or basements. We partner with top-tier manufacturers to ensure every installation meets our high standards of reliability and comfort.
Boiler and Hydronic Heating Services
For homeowners who rely on boilers or hydronic heating systems, proper maintenance is essential for consistent warmth and system longevity. GCS provides comprehensive boiler repair, replacement, and installation services throughout Milwaukee, WI.
Our technicians are skilled in diagnosing complex boiler issues, from loss of heat to uneven heating or pressure problems. We also specialize in hydronic heating systems, which circulate hot water through pipes to radiators or underfloor heating — offering even, quiet, and comfortable warmth.
If your boiler is old or inefficient, GCS can help you upgrade to a modern, energy-efficient model that lowers your energy costs and enhances comfort.
Emergency Heating Repair Services
When your heating system fails unexpectedly, you can rely on GCS for fast, reliable emergency service. Our technicians are available for emergency HVAC repairs because we know that losing heat isn’t just inconvenient — it’s a matter of safety and comfort.
We respond quickly, arrive prepared, and work efficiently to restore heat to your home as soon as possible. Whether it’s a broken furnace, a boiler issue, or a malfunctioning thermostat, we have the tools and expertise to fix it right the first time.
Quality, Integrity, and Good Customer Service
At GCS, good service isn’t just part of our name — it’s our promise. Every heating job we take on is approached with honesty, attention to detail, and respect for our customers’ time and homes. We believe that quality work and fair pricing should always go hand in hand, which is why we offer free estimates and veteran discounts on all heating services.

Our commitment to professionalism is backed by our credentials — we are a licensed HVAC contractor, EPA-certified, and fully insured. With nearly two decades of industry experience, our technicians know how to handle even the most complex heating systems with precision and care.
When you choose GCS, you’re choosing a team dedicated to delivering the best possible results — and treating you the way we’d want to be treated.
Schedule Your Heating Service Today
Whether you need a quick furnace repair, a new system installation, or expert maintenance to prepare for winter, GCS is your trusted local heating contractor in Milwaukee, WI. We take pride in providing reliable service, exceptional workmanship, and unbeatable customer care on every job. Don’t wait until the cold sets in — make sure your home is ready for the season ahead.
Call us at
(262) 202-4666 to request a service or schedule your free estimate today.