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A properly-functioning boiler is essential in Wisconsin’s cold-weather seasons. When your boiler breaks down, we won’t leave you out in the cold – our team of experts is here to help.
Harker Heating and Cooling offers emergency and non-emergency repair services to keep your household warm and comfortable. Our team of boiler service technicians have years of combined expertise diagnosing and repairing a variety of boiler issues. Whether you have a gas, electric, or oil-based boiler, we are ready to serve you.
Ready to begin? Contact our team for a complimentary quote estimate.
Call (608) 480-6786. Harker’s boiler specialists are available 24/7 to assist you with all of your emergency boiler repair needs.
When you join Harker Heating & Cooling’s FREE Goldstar Program, you’ll immediately save money on your annual heating and cooling tune-ups! Plus, enjoy 24/7 priority service.
When temperatures drop below freezing—which happens for months here in Wisconsin—a broken boiler can damage your home and your health. We know the stakes, which is why we’ve built our business around responding fast and fixing things right.
I’ve seen what happens when homeowners wait or trust the wrong contractor. Water pipes freeze, property damage escalates, and heating costs skyrocket from inefficiency. That’s exactly what we help you avoid.
Our fast boiler repair in Madison, WI means:
Wisconsin winters don’t pause for business hours, so neither do we. Whether it’s 2 a.m. on a Saturday or a holiday afternoon, our team is ready to restore your heat and comfort.
We’ve diagnosed and fixed thousands of boilers throughout Dane County. Here are the most common issues we see—and how we solve them:
This is the most common complaint we receive. You'll notice some rooms stay warm while others remain cold, or your boiler cycles on and off constantly. Usually, this points to a pressure issue, a failing thermostat, or sediment buildup inside the boiler. We check your boiler's pressure gauge first—it should read between 1.0 and 1.5 bars when cold. If it's low, we identify the leak. If pressure is normal, we test the thermostat and check for internal corrosion. Many times, a simple flush solves the problem.
Hearing loud banging, whistling, or popping sounds? That's usually trapped air or mineral buildup inside your boiler. While it might sound alarming, we can usually fix it without replacing the entire unit. We'll bleed air from your system and flush out sediment. Sometimes a power flush is needed—we can handle that too. The longer you wait, the more damage develops, so don't ignore these warning signs.
If you smell gas or notice water pooling around your boiler, stop using it immediately. Gas leaks are serious safety hazards. Water leaks damage your home and waste energy. We locate the source quickly—often it's a faulty valve, corroded connections, or a cracked heat exchanger. Once we identify the problem, we repair or replace the component. If the heat exchanger is damaged, we'll discuss whether repair or replacement makes sense for your situation.
An on-again, off-again pilot light usually means a dirty thermocouple, a gas supply issue, or a failing ignition system. We clean or replace the thermocouple, check your gas line, and test the ignition electrode. This isn't something to troubleshoot yourself—let us handle it safely.
If your heating costs climb without a change in usage, your boiler is losing efficiency. Sediment buildup, leaks, or a failing pump waste fuel and money. We perform a complete system inspection to find the culprit and restore efficiency. Many homeowners are surprised by how much they save after a proper repair.
Sometimes you need immediate help. Other times, you can schedule a convenient appointment. We handle both.
Call (608) 255-6902 right now if:
Our emergency technicians prioritize these calls. We'll assess what needs to happen and get you a timeline before we start work. In most emergencies, we resolve them the same day.
Not an emergency? We still move fast. We typically schedule non-emergency repairs within 24-48 hours. You choose the appointment window that works for you. Either way, we arrive ready to work—we stock parts on our trucks and carry diagnostic equipment. That means faster diagnosis and fewer return visits.
This is the question every homeowner asks us. The answer depends on age, repair history, and efficiency.
If your boiler is under 10 years old and this is your first major repair, fixing it almost always makes sense. We can usually get 5-10 more years of reliable service with proper maintenance.
If your boiler is 15+ years old, has needed multiple repairs in the past few years, or operates at 80% efficiency or lower, replacement often costs less over time. Older boilers waste fuel, driving up your heating bills month after month. We give you honest recommendations based on your specific situation. Sometimes we suggest a repair. Sometimes replacement saves you money long-term. We present both options so you can decide what's best for your budget.
We’ve been serving Madison homeowners since 1949. That’s not just a number—it means generations of families trust us with their heating systems.
We know Madison's climate, the boiler models installed in our area, and the common problems that develop in older homes. We're not a national franchise trying to upsell you. We're your neighbors who want you to be comfortable and safe.
Every technician on our team is licensed and trained on gas, electric, and oil boilers. They arrive in uniform, ready to work professionally. We background-check everyone who enters your home.
We quote the job before we start. No surprises when the bill arrives. If we discover additional issues during the repair, we explain them and get your approval before proceeding.
Boiler emergencies don't happen at convenient times. We staff our phones and dispatch trucks around the clock, 365 days a year.
Join our free Goldstar Program and get priority scheduling, discounts on tune-ups, 24/7 priority dispatch, and peace of mind. Many homeowners save money in the first year they join.
When we arrive, here’s what happens:
We make sure your home is safe. If we detect a gas leak, we'll ventilate and advise you to call emergency services if needed.
We test pressure, check the thermostat, inspect all connections, and listen for unusual sounds. We run the system through a complete cycle to identify the problem.
We explain what we found in simple terms. We show you the problem, discuss options, and quote the repair cost.
If it's a straightforward repair, we fix it on the spot. If it's complex or if we recommend replacement, we walk you through options.
When we arrive, here’s what happens:
We test the system thoroughly before we leave. We'll also explain how to maintain your boiler to prevent future problems.
The best boiler repair is one you never need. Here’s how to keep your system healthy:
Your boiler breakdown doesn’t have to ruin your winter or empty your wallet. We respond fast, diagnose accurately, and repair right the first time.
Whether it’s an emergency at midnight or a scheduled repair next week, we’re here for you.
Call us at (608) 255-6902 or book online now.
We’ll get your heat back on and your home comfortable again—fast.
Harker Heating & Cooling has served Madison and Dane County since 1949. We’re available 24/7 for emergency boiler repair, maintenance, and installation. Our certified technicians are ready to help.
Service available in Madison, WI, and surrounding areas.
Book Your Boiler Repair Now
Call (608) 255-6902
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Exact repair costs depend on the type of repair, the technical knowledge required to complete the repair, and the cost of parts if a component needs to be replaced. Contact a Harker expert for a boiler repair quote based on your needs.
While replacing a boiler typically has a higher upfront cost, a boiler that is very old or needs constant repair may end up costing more in the long run due to energy inefficiency and repair costs. A Harker specialist can provide a repair or replacement recommendation based on your current boiler’s condition.
Oftentimes, boilers fail because they have not been properly maintained. Worn down components, trapped dust and debris, incorrect water pressure, and other problems that are normally solved during maintenance can lead to total boiler failure if left unchecked.
A broken boiler is an emergency situation if your household no longer has access to heated water, particularly if the breakdown occurs during winter. Additionally, some broken boilers can cause dangerous gas and water leaks. If you smell gas, evacuate your home immediately and call local emergency services.
For your safety, if your boiler breaks, do not try and repair it yourself. Contact Harker Heating and Cooling’s 24/7 hotline for an expert consultation and emergency boiler repair.
Common signs of boiler failure include:
When in doubt, contact a Harker expert for a consultation and recommended next steps to get your boiler functioning normally.
The cost of a new furnace can vary based on the type, size, and efficiency. Schedule a free estimate with Harker Heating and Cooling to find the right furnace for your home and budget.