
Boiler Repair in Superior, WI & Duluth, MN
Boiler repair and replacement.
A lot of homes up here heat with hot water. Cast iron radiators, in-floor loops, combi units. Our techs work on them every week, not once a season.
Get Your Boiler Looked At
Tell us what it is doing and a real person will call you right back.
Emergencies: call (715) 817-4404 any hour.

A boiler is not a furnace with water in it.
Converting a gravity system to forced air means new ductwork through a house that has none. Usually the honest answer is a proper repair, or a modern boiler in the same footprint.
- Circulator pumps, zone valves, expansion tanks, aquastats
- Bleeding and rebalancing loops so every room heats
- High-efficiency and combi replacements when repair stops paying
- Upfront pricing approved before anything comes apart
What every boiler call includes.
Diagnosis
We find the actual fault in the loop, not just the symptom in the room you noticed.
Steam & Hot Water
Gravity conversions, modern closed loops, in-floor, combi units that do heat and hot water.
Plumbers On Staff
A boiler is heating and plumbing at once. Five plumbers on staff ride with our HVAC crews.
Safety Check Included
Pressure relief, venting, and CO checks on every call, because these systems run hot for months.
Clean Work
Respect for your home. Old boiler rooms are tight and dusty. We leave them better.
Repair or Replace, Both Priced
If replacement beats repair, you see both numbers with financing options. Your call, not our pitch.
What customers say about our boiler work.
4.5 out of 5 from 232 Google reviews
Chase went above and beyond to fix my boiler and water heater that were both leaking. I highly appreciated his kindness, professionalism, diligence, and patience (as he reassured me when I asked multiple times if they were going to explode hah). I will definitely be requesting him for our yearly service check appointments! Thanks, again, for your help Advantage Air and Chase!
Great service! Stopped in last Thursday and had someone in Monday to check and fix our boiler. Bryce was very helpful. Will call again if needed!
Always a company that responds quickly when we call. They have serviced our boiler and plumbing issue needs every time we call. Thanks Advantage Air
Boiler repair by town
What people ask about boiler repair
Much of this housing stock went up before forced air was standard, so hot water heat with cast iron radiators was simply how homes were built. Those systems last a long time when they are maintained.
Usually trapped air or an unbalanced loop, and both are fixable without replacing anything. Bleeding and rebalancing a system is a routine visit for us. If a circulator pump or zone valve has failed, we will show you which one.
Usually not just for the sake of it. Converting means running all new ductwork through a house that has none, which is expensive and invasive. A modern high-efficiency boiler often makes far more sense, and we will give you both numbers honestly.
Old cast iron units regularly run 30 to 50 years. Modern high-efficiency units are more like 15 to 20 but burn far less fuel. Annual service matters more on a boiler than almost any other appliance in the house.
Get your radiators warm again.
Call now or request service online and a boiler tech will call you back.