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Mavec Heating, A/C & Refrigeration

"No Service Is Too Small"

About Us

Founded in 2000, Mavec Heating, A/C & Refrigeration has built a strong reputation as the go-to provider for dependable climate control and refrigeration services across Marseilles, Morris, Seneca, Ottawa, and surrounding areas in LaSalle and Grundy counties. We proudly serve both residential and commercial clients, offering expert solutions for projects of all sizes.

Our licensed, bonded, and insured team is equipped to service all makes and models, ensuring your systems run efficiently and reliably. From heating and cooling repairs to rooftop units, park model systems, and commercial refrigeration, we deliver quality workmanship with every job. As proud American Standard dealers, we offer top-tier products known for performance and durability. Plus, with emergency service available on weekends, we’re always ready when you need us most.

Experience 25 years of trusted service—choose Mavec for comfort that lasts.

Areas Served

Our Certifications

Licensed, Bonded and Insured

What We Offer

Our Specialties include:

At Mavec Heating, A/C & Refrigeration, we pride ourselves on being a versatile and dependable service provider for both residential and commercial clients. Our team is trained to service all makes and models, ensuring that no matter your system’s brand or complexity, we have the expertise to keep it running smoothly. We understand that heating, cooling, and refrigeration issues don’t always happen during business hours—that’s why we offer emergency service on weekends, providing fast, reliable support when you need it most. Whether it’s a home comfort system or a commercial refrigeration unit, Mavec is your trusted partner for quality and responsiveness.

Our Services include:

Cooling Services: We provide expert air conditioning services for residential, commercial, and park model properties, including rooftop unit installations and maintenance. Our team is equipped to service all makes and models, ensuring reliable comfort during the hottest months.
Heating Services: From residential heating systems to commercial rooftop units and park model heating, we offer comprehensive heating services tailored to your needs. Our technicians handle repairs, maintenance, and installations with precision and care, keeping your space warm and energy-efficient.
Refrigeration Services: We specialize in servicing and installing commercial refrigeration systems, including walk-in coolers, reach-in units, beer coolers, and ice machines. Whether you're running a restaurant, bar, or retail space, we ensure your equipment operates at peak performance.
Repair & Maintenance: Our skilled technicians provide prompt heating and cooling repairs across all system types and brands. With emergency service available on weekends, we’re here when you need us most to restore comfort and functionality to your home or business.

Our Brands include:

American Standard
Trane
RunTru
Ameristar

Our Products include:

Furnaces
Commercial Refrigerators

Testimonials

On 10/28/2025 Chad Paulson had this to say:
Great, quick service and a straight shooter! I called and he had my furnace up and running within the hour! Testimonial written by Chad Paulson on this site.

On 10/28/2025 Chad P. had this to say:
John is an honest, straight shooter, and very quickly to respond! He had my furnace up and running within the hour of my call!!! Highly recommended!!!

On 10/17/2025 Michelle Hebding had this to say:
Talked himself out of a job... best ever! Totally trust worthy. Testimonial written by Michelle Hebding on this site.

On 9/2/2025 Jennifer had this to say:
Always my first call! Works with our schedule and does great work! Testimonial written by Jennifer on this site.

On 8/18/2025 Sarah Schopp had this to say:
John has always been AMAZING when it comes to fixing heat, a/c, & refrigeration units at the businesses I've worked for, for the past 15+ years. He received a call this morning from the owner, and was here to fix our a/c within an hour. He spotted the issue right away & had it fixed shortly after. HIGHLY recommend always!!! Best around, hands down.

Contact Us

Mavec Heating, A/C & Refrigeration
Marseilles, IL 61341
Phone: (815) 955-1379
Email: mavec@mtco.com

Where To Find Us

Payment Types Accepted

American Express, Discover, MasterCard, Personal Checks, Square Accepted, Visa

Our Hours

24 Hour Emergency Service

Holiday Hours May Vary. Please Call For Details.

Monday: 8:00 AM - 5:00 PM
Tuesday: 8:00 AM - 5:00 PM
Wednesday: 8:00 AM - 5:00 PM
Thursday: 8:00 AM - 5:00 PM
Friday: 8:00 AM - 5:00 PM

FAQ

What services do you offer?

We provide heating, air conditioning, and refrigeration services, including installation, repairs, and maintenance.

How can I schedule a service appointment?

You can schedule a service by calling us directly or through our website's contact form.

How often should I replace my HVAC filters?

HVAC filters should typically be replaced every 1-3 months, depending on your system and usage.

Do you offer energy-efficient HVAC options?

Yes, we carry a variety of energy-efficient systems to help reduce your energy bills and environmental impact.

How can I improve the indoor air quality in my home?

Regular maintenance, using air purifiers, and sealing ducts can significantly improve indoor air quality.