Commercial Boiler Service and Repair
We service the boiler and the controls that sequence it, steam and hot water alike, so a plant room in a Milwaukee or Waukesha building has one contractor from the burner to the outdoor reset.
Call (414) 899-4641to schedule an inspection or reach a technician about a building that has lost heat.
Commercial Boiler Service for Buildings That Cannot Lose Heat in January
Commercial boiler service is the core of the heating work we do across Waukesha, Milwaukee, Madison and the ten southeastern Wisconsin counties we cover, on low-pressure steam in older school and municipal buildings and on hot water and condensing systems in newer construction. Furnaces, unit heaters, rooftop heating sections, radiant heaters and make-up air units come with the territory, and we service those too.
We have been commercial and industrial only since 2008, family owned and based in Waukesha, insured and bonded. Our technicians hold master certifications with steam and hydronic experience, and you get scope, timing and cost before a truck rolls.
Every Piece of Heating Equipment in a Commercial Plant Room
We repair, maintain, install and replace the full range of heating equipment a commercial or industrial facility runs:
Steam and hot water boilers, from legacy low-pressure steam plants to modern high-efficiency condensing systems.
Commercial furnaces and unit heaters for office buildings, retail centers, warehouses, shops and garages.
Rooftop heating units, the gas heat side of the packaged equipment carrying multi-tenant offices and shopping centers.
Radiant heaters and make-up air units for large open spaces and industrial environments where ventilation and heat are tied together.
Circulator pumps, feedwater and condensate equipment, expansion tanks, valves and piping in the plant room.
What We Do on a Commercial Boiler and Heating Call
Boiler repair and troubleshooting, including burner tune-ups, combustion analysis, pump replacement, pressure and heating complaints, and safety-control faults.
Boiler and heating system installation and replacement, planned and sized to the building, including efficiency retrofits staged to limit disruption.
Furnace and unit heater service that keeps a warehouse, shop or garage heating safely through a Wisconsin winter.
Boiler sequencing, outdoor reset and safety interlock work, handled by the same team that services the burner rather than a separate controls contractor.
Annual inspections, combustion testing and documented findings on each visit.
Steam and Hot Water Systems Are Two Different Service Calls
A low-pressure steam plant in a 1920s school building and a condensing hot water system in a 2015 office fail in different places, and a technician who only knows one of them will chase the wrong symptom. We work on both.
On steam systems, the calls that come in most often are pressure that will not hold, condensate return and feedwater problems, failing traps and vents that starve radiators at the end of a run, low-water cutoff and safety-control faults, and burners drifting out of tune until the stack tells on them. Older buildings also bring piping, insulation and header conditions that shape what a repair can reasonably accomplish.
On hot water and condensing systems, the failure modes shift to circulator pumps, air in the loop, expansion and makeup problems, scaled or sooted heat exchangers, ignition and flame-proving faults, condensate neutralization on high-efficiency units, and outdoor reset or sequencing set up wrong so the plant either overshoots or never reaches temperature.
Either way we diagnose the plant before quoting work, and we will tell you when the system you have is worth repairing rather than replacing.
No Heat on a Friday Night, and a Technician Answers the Phone
A no-heat call in January is a building problem within hours. Pipes are at risk, a school decides about the next morning, and a plant room nobody has opened since fall is where the answer is. Emergency calls reach a technician with steam and hydronic experience rather than an answering service.
Tell us the building, the system and what the boiler is doing, whether it is locked out, cycling on a safety, running with no heat reaching the zones, or down cold, and you get an honest read on when someone can be on site and what the visit will cost before a truck rolls. Emergency heating response covers Milwaukee, Waukesha and the surrounding counties, outside our Monday through Friday, 8am to 5pm office hours.
Annual Boiler Inspection, Combustion Testing and Documented Findings
An annual inspection is where a boiler's condition gets established on paper instead of guessed at. Every visit includes combustion analysis with recorded readings, a low-water cutoff test, flame supervision and pilot proving, relief valve inspection and replacement where it is due, gas train and burner condition, heat exchanger cleaning, safety-control verification, and water treatment condition on steam and hydronic systems. Findings are documented so a repair recommendation, a warranty requirement or a board question all have a record behind them.
That record is also what catches the conditions nobody wants to find in a cold snap, a boiler drifting toward a pressure problem, a combustion issue that turns into a carbon monoxide concern, or a plant losing efficiency every hour it fires. Buildings running more than one boiler, or a fleet of heating equipment across several sites, are usually better served by a
scheduled maintenance agreement than by calling per inspection.
Get the Plant Room Ready Before the First Hard Freeze
Heating work is cheapest and least disruptive in the months nobody is thinking about it. This is the sequence we run with facilities across southeastern Wisconsin.
Late summer inspection
The boiler comes apart while the building does not need it. Heat exchanger, burner, controls and safeties get inspected, and anything needing parts has a lead time that still fits.
Repairs and parts before October
Feedwater and condensate work, pump replacements, relief valves, traps and control repairs get completed while scheduling is flexible and the building is warm.
Burner tune-up and combustion analysis before the first hard cold
The plant is fired, tuned and tested under load, with readings recorded, so it starts the season at the efficiency it is capable of rather than drifting through it.
Controls and sequencing verified
Schedules, outdoor reset curves, staging between boilers and safety interlocks are checked against how the building is actually occupied.
Skipping the sequence moves the same work to a mid-winter failure, when a repair happens under emergency conditions, in an occupied building, with whatever parts are available.
Master-Certified Technicians on the Boilers You Actually Run
Our technicians hold master certifications and carry factory training from major heating equipment manufacturers, with hands-on experience on both steam and hydronic plants. That covers combustion testing, relief valve replacement, feedwater and condensate work, burner overhauls, and complex or high-pressure systems where the safeties matter more than the schedule.
We service all major commercial boiler brands, including Cleaver-Brooks, Weil-McLain and Burnham, so a legacy plant and a new condensing installation in the same portfolio stay with one contractor. Because we install and program controls as well as service mechanical equipment, boiler sequencing, outdoor reset and safety interlocks are handled by the same people servicing the burner, and a building with uneven heat gets diagnosed once instead of passed between two contractors.
Boiler Work in Milwaukee Buildings, and What It Actually Looks Like
Commercial boiler service in the Milwaukee metro means working on a building stock that spans a century. Downtown and near-north-side buildings run legacy low-pressure steam with original piping and headers. Schools and municipal buildings carry boiler plants that have to hold heat through a school day and a February cold snap on a fiscal-year budget. Industrial plants in the valley and the surrounding corridors run plant rooms where process heat and comfort heat share the same equipment, and a shutdown costs production as well as comfort.
That is the work we do, and it is why boiler calls here go to a contractor with steam experience rather than one who only sees condensing equipment. Our
commercial HVAC and boiler service in Milwaukee runs alongside the same work in Waukesha County, Madison and the eight other counties we cover, including
school districts
where heating and cooling are the same annual conversation.
Boiler Questions Facility Managers Bring Us
Who does emergency boiler repair in Milwaukee after hours?
Advanced Chiller Services answers after-hours no-heat calls for commercial and industrial buildings across Milwaukee and southeastern Wisconsin, and the call reaches a technician with steam and hydronic experience rather than an answering service. Call (414) 899-4641 with the building, the system and what the boiler is doing. Scope, timing and cost are stated before a truck rolls.
Why does my building boiler keep losing pressure?
Repeated pressure loss on a hot water system usually traces to a leak somewhere in the loop, a failing expansion tank, an automatic makeup valve doing more work than it should, or a relief valve weeping. On a steam system it more often points at condensate return or feedwater problems. The fix starts with finding where the water is going rather than adding makeup water, because continuous makeup introduces fresh minerals and oxygen that damage the plant.
Do you still service old steam boilers?
Yes. Low-pressure steam plants in older school, municipal and downtown buildings are a regular part of our work, including burner tune-ups, combustion testing, relief valve replacement, low-water cutoff testing, and feedwater and condensate repairs. A steam system being old is not by itself a reason to replace it, and we will tell you what the plant you have is still worth before quoting a replacement.
How often does a commercial boiler need to be inspected in Wisconsin?
Plan on an annual inspection with combustion analysis at minimum, scheduled in late summer or early fall so repairs and parts land before the heating season. Buildings with multiple boilers, process heat, or a plant carrying occupancy that cannot be interrupted are usually on a tighter interval set against the equipment and the consequence of it failing. We document each visit so the inspection history stands as a record.
My hot water boiler is running but the building is uneven. What causes that?
When the boiler fires and zones still fall short, the problem is often in distribution or controls rather than the boiler itself, air in the loop, a failed circulator, a stuck zone valve, or an outdoor reset curve and staging sequence that never matched how the building is occupied. We service the boiler and the controls that sequence it, so both halves get checked on the same visit instead of being split between contractors.
Schedule Your Boiler Inspection Before the Season Decides for You
Tell us the heating equipment you run and the buildings it serves, and we will inspect the plant, document its condition and put the repairs, timing and cost in writing. Commercial and industrial facilities only, across Waukesha, Milwaukee, Madison and the ten southeastern Wisconsin counties we cover.
Call (414) 899-4641, Monday through Friday, 8am to 5pm, with no-heat emergencies answered outside office hours.
