Yes, we repair and replace steam and hot-water boilers all over Minneapolis, including cast-iron units still heating pre-1940 houses around the lakes and in Northeast. A service call is a $79 trip charge, waived when you approve the repair, and the price is in writing first. Open 7 days, 7am–9pm.
A lot of Minneapolis still heats with water. Four-squares, duplexes and bungalows built before 1940 often kept their boiler when the neighbors converted to forced air, and many of those are cast-iron units that have run for decades. The calls follow the season: radiators cold at the top from trapped air, a relief valve weeping because the expansion tank lost its air charge, a circulator that hums without moving water, and steam pipes that bang after a basement remodel knocked a main out of pitch.
When a boiler needs replacing, the first question is steam or hot water. Hot-water systems can move to a modulating condensing boiler vented in PVC, which leaves the water heater alone in the old chimney and may call for a liner. Steam systems need a steam boiler. Pipe wrap in houses this old can contain asbestos and gets tested before anyone cuts. For scale, HomeGuide puts a typical national range for gas boiler replacement at $4,000–$9,000.
Updated September 23, 2026
Every boiler service call in Minneapolis starts with a $79 trip charge, waived when you approve the repair, and a written price before any work. Same prices in Minneapolis as in every town we serve. Replacing an old boiler? See the boiler replacement cost guide. For what drives a quote locally, see HVAC cost in Minneapolis.
More detail on our boilers & radiant heat page.
Symptom guides: Banging or kettling · Expansion tank · Carbon monoxide
Often, if the piping allows it. On a hot-water system we can split the building into two zones with zone valves or separate circulators, each on its own thermostat, as long as the supply and return piping for each unit can be separated in the basement. Steam is much harder to zone. We trace the piping first and tell you what it would take before quoting.
Usually not. Running new ducts through a plaster house is disruptive and eats closet and ceiling space, while a sound radiator system gives quiet, even heat. Most owners do better keeping hot water, replacing the boiler when it's worn out and adding ductless mini-splits for cooling. If the radiators or piping are failing, the math changes, and we'll show you both options.
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Read the guideKeep the boiler or switch to a furnace? How Saint Paul radiator homes and postwar houses decide, what each costs to replace, and how to add AC without ducts.
Read the guideA boiler expansion tank absorbs water that swells as it heats. How it works, what the pressure gauge tells you, and why a dripping relief valve is the clue.
Read the guideBoiler service in Minneapolis? Call or send a request.
