Boiler service built for Minnesota winters
Many Duluth homes and most older commercial buildings heat with hot water. A well-maintained boiler delivers steady, quiet heat for decades, but when one fails in subzero weather, the risk of frozen pipes rises fast. Carlson Duluth Company diagnoses and repairs leaking boilers, pressure problems, uneven heating and ignition failures, and we install new high-efficiency boilers for homes and businesses across southern St. Louis County.
Warning signs your boiler needs attention
Boilers usually show symptoms before a major breakdown. Addressing them early prevents bigger repairs and mid-winter outages. Watch for:
- Uneven or insufficient heat, with some radiators or zones staying cool
- Water leaks around the boiler or a pressure gauge that keeps dropping
- Banging, whistling or rattling from the boiler or the pipes
- Pilot light outages or repeated ignition problems
- Heating bills climbing while your habits stay the same
- Frequent cycling, or shutdowns during cold snaps
- Rust or corrosion on fittings and piping
Duluth winters work a boiler harder than most climates. Pumps, valves and ignition controls run longer and more often, which speeds up wear. Trapped air, a failing zone valve or a weak circulator can all leave part of the house cold while the rest is fine.
What is included
- Emergency boiler repair for loss of heat, pressure problems and shutdowns
- Residential boiler installation, including hydronic and radiant heating
- Commercial boiler replacement for offices, retail and larger facilities
- Seasonal maintenance and tune-ups
- High-efficiency upgrades with Weil-McLain and Knight boilers
Our process
For repairs, we start with a thorough system diagnosis rather than guessing at parts. We check pressure, circulation, controls, ignition and venting, then explain what we found and what we recommend. When the heat is out, restoring it safely comes first.
A tune-up includes inspecting components, checking pressure levels, cleaning system parts and identifying wear before it turns into a failure. Routine service improves efficiency and helps extend the life of the boiler.
When replacement is the better choice, we size the new boiler to your building’s actual heating demand and plan the installation around your schedule. We install Weil-McLain and Knight equipment. Knight heating boilers go beyond standard Energy Star requirements with a 95% AFUE rating and come with a full 12-year warranty. A modern high-efficiency boiler can improve heat distribution, cut wasted energy and hold more even temperatures throughout the property.
Hydronic and radiant heat
Hot water heat is quiet, even and free of the drafts that come with forced air. We design residential systems around your home, whether that means baseboard or radiators on several zones or radiant tubing under a basement slab or a bathroom floor. On a replacement, we also look at the circulators, zone valves and expansion tank, because an efficient new boiler only performs as well as the piping around it.
Why Carlson Duluth Company
We service and install boilers for homes, businesses, offices and larger commercial facilities. Our portfolio includes a church boiler replacement and the mechanical room at Bell Bank, and our team brings code-compliant installation, clear communication and practical knowledge of northern Minnesota heating demands to every job.
Hot water heat is familiar ground for us. The Carlson family has worked on heating systems in Duluth since 1905, and today the company is owned by Jeremy Carlson, a licensed Master Plumber. Our union-trained craftsmen treat your building with care from start to finish.
Area served
We provide boiler repair and installation throughout southern St. Louis County, including Duluth, Proctor, Hermantown, Midway Township, Brookston, Cotton and Floodwood, plus Superior, Cloquet and the surrounding communities. Whether your boiler needs a repair, a replacement or its annual tune-up, call (218) 727-0063 to schedule service or ask for a free estimate.