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St Louis Furnace Installation & Repair

All furnace repair service fees are included in the cost of the repair, and furnace replacement and installation quotes are always 100% free. If your furnace isn't functioning to its highest capacity or isn't functioning at all, Weis' team of factory-certified and trained professionals will find the source of the problem, guaranteed.

Brands we Service

Why Choose Weis?

We install industry-proven furnace brands that ensure the happiness and comfort of our customers for years to come. Weis Comfort Systems has been installing and repairing furnaces in St. Louis, MO for over 80 years. We make it both easy and affordable to heat your home and live comfortably. Get an installation quote today by visiting our service request form.


Dedicated Service

In our effort to prove our commitment to customer satisfaction, the HVAC contractors of Weis Comfort Systems undergo continual training, education, and safety courses to ensure we provide our clients with the industry's most current and efficient practices, products, and security.

Flexible Payment

We accept a wide range of payment options, including Visa, Mastercard, cash, checks, & financing. If you are in need of additional funding for furnace, air conditioning, or ventilation repair or installation services, please visit our pricing and financing page.

Commitment to Safety

We have paired state-of-the-art products, safety, and practices with thorough hiring methods to ensure that our team of HVAC contractors have the experience, background, and skill set to accurately repair, install and maintain comfort systems throughout the St Louis area.

Simple Satisfaction

Weis Comfort Systems is licensed and insured, and our team of expert technicians performs HVAC repair, maintenance, and installation with high detail to ensure that our AC, furnace, and ventilation services are up to code and built to last.


Starting at $185
  • First System: $165
  • Additional Systems: $145 each
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Furnace Tune-Up

Starting at $89
  • First Furnace: $89
  • Second Furnace: $69
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Furnace Repair

Starting at $$$
  • Flat Rate Pricing
  • Service fee included
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Trusted for 80 Years

Trusted for 80 Years

Furnace Installation and Repair. Backed by over 80 years of HVAC industry experience, home and property owners alike can rest assured that the Weis Comfort Systems' team has the knowledge and experience to properly complete their St Louis furnace repair or installation services. By serving our customers with the highest standard of furnace installation, furnace repair, and maintenance, we're able to increase the lifespan of your heating system, or install a new furnace that will last for decades, all while cutting energy costs and guaranteeing that your living space or property retains the perfect temperature balance. To learn more about our furnace repair services or furnace installation, or to get started on your free estimate, request a quote from Weis today.

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Certified Factory Trained Technicians

Certified Factory Trained Technicians

If your furnace is no longer functioning efficiently, Weis Comfort Systems can evaluate your heating system to determine if it needs to be repaired or replaced. Our technicians are trained using top repair techniques to ensure that your furnace is back in working condition quickly. If your furnace is old, worn out, or malfunctioning, selecting a new heating system to best fit your needs can be difficult without industry knowledge. Weis' is made up of a team of people who are driven by the shared commitment to providing only the best furnace installation, repair, replacement, and maintenance to our customers. By having a new furnace installed by Weis, you will be able to provide the perfect atmosphere for friends, family, guests, or property inhabitants.

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Choose Your Service Area

Weis Comfort Systems

1591 Fenpark Dr.
Fenton, MO 63026
Hours: M-F 8:00AM - 4:30pm

Weis DeRousse

124 N. Main
Red Bud, IL 62278
Hours: M-F 8:00AM - 4:30pm

Weis Keil-Forness

Located In:
Belleville, IL 62220
Hours: M-F 8:00AM - 4:30pm

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