About Carroll Mechanical Services

Carroll Mechanical Services, located in Longmont, specializes in residential and commercial HVAC installation and services. With over 25 years of experience, they offer top-quality service at reasonable prices. The company installs Carrier brand HVAC systems and services all heating and air conditioning brands, ensuring customer satisfaction. Customers appreciate the quick and efficient installation process, often with a new heating system in place within a day. The technicians are known for being friendly, knowledgeable, and dependable, with one technician especially praised for their expertise. The owner is described as trustworthy and reliable, and the office staff is friendly and helpful. The technicians are very prompt, personable, and professional, making sure everything is done right and to code. Customers also value their honesty, such as fixing a small issue with an old AC instead of pushing for a replacement. Recently, Carroll Mechanical Services has started offering plumbing services, with Gerry the Plumber providing thorough evaluations of homes, checking sump pumps, water heaters, pipes, and toilets, and even testing water quality. Clients find their services affordable and educational. The staff is known to go above and beyond, as seen when technicians braved a hidden wasp nest to complete their work. Customers have praised the company for diagnosing issues quickly and working with manufacturers to get repairs covered under warranty. Overall, Carroll Mechanical Services is committed to listening to customers and providing great products, installation, and financing options, making them a preferred choice in the Longmont area.

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Reviews for Carroll Mechanical Services

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  • Jul 2026

    We wanted a second opinion on a furnace repair/possible replacement from another company that seemed high, and -- to us--unnecessary, as we keep our HVAC serviced twice a year. Dan H came out and was very honest and informative. He gave us what we think was a more realistic view of the equipment and what we should plan for and expect. We aren't the types to ignore problems or get second opinions based on wishful thinking, but we had a bad feeling from the first service person and were happy that Welzig sent out a technician with a lot of experience. We're happy to recommend this service person!

  • Jan 2026

    Welzig serviced my tankless waterheater and checked the house water pressure and toilets for proper operation. He had a few recommendations and was very thorough. Thanks for the checkup.

  • Jan 2026

    Great service!! The technicians were informative and explained everything that they were going to do. I would highly recommend the service plan. Happy I chose this company with my new purchase to Home

Hours

Monday: 8AM - 4PM
Tuesday: 8AM - 4PM
Wednesday: 8AM - 4PM
Thursday: 8AM - 4PM
Friday: 8AM - 4PM
Saturday: ClosedSunday: Closed

Tips

accepts credit cards