What should I do if my furnace starts leaking water during winter?

If your furnace begins leaking water during winter, it's crucial to turn off the power immediately to prevent further damage. Clean up any water around the unit and inspect components like the humidifier, condensate pump, and flue pipe for issues. If the problem persists, contact a professional HVAC technician in Bozeman, MT, for assistance.

Can I repair a leaking furnace myself?

While some minor issues can be addressed by homeowners, repairing a leaking furnace often requires specialized knowledge and tools. Attempting DIY repairs can lead to further damage or void warranties. It's recommended to consult a professional HVAC technician in Bozeman, MT, to ensure safe and effective repairs.

How often should I have my furnace serviced to prevent leaks?

Regular maintenance is key to preventing furnace issues, including leaks. In Bozeman, MT, it's advisable to schedule a professional inspection and maintenance at least once a year, ideally before the winter season, to ensure your furnace operates efficiently and safely.

What are common causes of furnace water leaks in winter?

Common causes of furnace water leaks during winter include issues with the humidifier, such as clogged or dirty filters, problems with the condensate pump in condensing furnaces, and improperly installed or blocked flue pipes. Identifying the specific cause requires a thorough inspection by a professional HVAC technician in Bozeman, MT.

How can I prevent my furnace from leaking water in the future?

To prevent future water leaks, ensure regular maintenance of your furnace, including cleaning or replacing filters, inspecting and servicing the condensate pump, and checking the flue pipe for proper installation and blockages. In Bozeman, MT, scheduling annual professional inspections before the winter season can help maintain your furnace's performance and prevent issues.

Furnace Leaking Water in Winter: Steps to Take

Premier Systems

December 5, 2022

The winter is when we depend on our furnaces the most. Unfortunately, during the winter, your furnace becomes more susceptible to breaking down. A furnace leaking water in winter generally indicates a bigger problem.

Sometimes this problem is an easy fix, but other times the solution can be more complicated. This guide explores what to do with a leaky furnace, including when to call for a furnace repair by Premier Systems.

Do You Have a Conventional or Condensing Furnace?

Before diagnosing what caused the leak and implementing the right repair solution, you'll need to check what kind of furnace you have.

It's easy to tell if you have a conventional furnace if you can spot a metal exhaust. Another way you can tell is if it has an Annual Fuel Utilization (AFUE) rating at or below 90 or if there isn't an AFUE rating listed.

If your furnace has a PVC exhaust pipe or an AFUE rating above 90, then it's a condensing furnace. A conventional furnace leaking water in winter is never a good sign and requires a call to an HVAC professional.

What Are the Main Causes of Furnace Water Leaks?

Knowing how to repair a leaky furnace starts with accurately diagnosing the problem. For example, it's normal for a high-efficiency furnace to produce condensation, which usually isn't an issue. However, your furnace may have a broken part:

Problem with Your Humidifier

AC units have a dehumidifier, while furnaces often have a humidifier. A humidifier's primary purpose is to add moisture to the air. This added moisture results in more trapped heat, warming your home more efficiently during the colder months.

Not every furnace has a humidifier, however. You can quickly tell if your furnace has a humidifier by seeing if it has a box with several pipes and wires running toward your furnace.

Sometimes a humidifier can cause your furnace to leak, usually because you have a clogged or dirty filter. You only need to clean or replace the filter to resolve this problem.

Your humidifier's drain can also be clogged, meaning you'll need to clean it. While a clogged drain or filter is usually an easy fix, it's crucial never to ignore a leak. Even a minor leak can escalate into a bigger issue that may require extensive repairs.

Condensate Pump

Not every furnace has a condensate pump, and this is an issue that only pops up in condensing furnaces. These furnaces feature condensate pumps designed to push created condensation inside the furnace out to pipes.

A malfunctioning condensate pump can trigger water backups, resulting in a leak. It's not advisable to attempt a condensate pump repair yourself. Instead, it's better to call a professional HVAC crew.

Flue Pipe

An ill-fitting flue pipe can often trigger a leak, requiring immediate repairs. Your heat exchanger can create condensation, and your flue pipe is responsible for draining this condensation. However, an improperly installed flue pipe can cause a water leak.

If you have a leaky conventional furnace, you should look at your flue pipe before anywhere else. However, the issue can also be your drainpipe.

Conventional furnaces don't produce condensation within their unit. Instead, they use a drainpipe to remove gases outside, creating condensation. Like with a flue pipe, an ill-fitted drainpipe can cause a leak.

Secondary Heat Exchanger

A furnace leaking water in winter can also be due to your secondary heat exchanger. A secondary heat exchanger absorbs your primary heat exchanger's combustion exhaust. Your furnace then releases excessive heat, producing water vapor.

Look for the following signs to check if your secondary heat exchanger is damaged:

You can spot water dripping from the fan compartment.
You can see some visible cracks.
You notice corrosion on your secondary heat exchanger.

Unfortunately, a damaged secondary heat exchanger can often mean your furnace is reaching the end of its lifespan. It's possible to repair a furnace with this problem, but usually, it's cheaper to replace it with a new energy-efficient model.

What Should Homeowners Do If Their Furnace Starts Leaking During Winter?

Whether you're dealing with a minor or a substantial leak, taking immediate action is vital. Here are the following steps to take when dealing with a furnace leaking water in winter:

Turn off your furnace's power: Many furnaces have a switch you can flip to turn off your furnace quickly. However, if you cannot spot one, you can turn your system off using the breaker.
Clean up any water around the unit: Start by soaking up all the water around your unit using a dry towel. However, you may need to use a wet-dry vacuum for large water amounts.
Try diagnosing the issue: Try diagnosing the issue before calling a professional HVAC team. If you have a dirty or clogged air filter, replace it with a new one to see if that resolves the problem.
Call a professional HVAC team: Lastly, you'll want to call a professional HVAC team. The right team will bring years of experience and can quickly resolve any leak you may have.

Can You Repair a Leak Yourself or Hire an Amateur?

Some homeowners see an issue like a leaking furnace as a chance to try out their DIY skills. However, you shouldn't try repairing a furnace yourself for the following reasons:

You May Not Have the Right Tools

A professional HVAC team brings the right tools to repair and install furnaces. However, you may need to buy new tools before repairing your furnace or spend much more time with the obsolete tools you have.

You Can Cause Further Damage

You can end up damaging your furnace when attempting to repair it. Even if you fix the initial leak, you can create the right conditions for parts to break down in the future. A professional HVAC team can avoid this problem.

You Can Void Your Warranty

Many furnaces have a warranty that can save you money in the long run. However, these warranties generally have some restrictions. One typical limitation is that you can't have an unprofessional service your furnace.

Likewise, if you use a service from an unlicensed maintenance team, you may not be covered if they damage your furnace.

How Often Should You Service Your Furnace?

Some homeowners only call a repair team when they notice issues with their furnaces. Besides a leak, other issues can include:

A furnace blowing cold air
A furnace not turning on or short-cycling
A furnace being abnormally loud
Having broken down parts
Suddenly having skyrocketing energy bills

The best way to solve these problems is through preventative measures. Servicing your furnace at least once a year can catch and fix minor issues before they become major headaches. It's best to service your furnace right before winter.

For the Best Furnace Repair Services, Call Us Today

Furnaces can make your home and family comfortable, especially during winter. Besides keeping you warm, a furnace can also improve indoor air quality and overall comfortability.

However, a furnace leaking water in winter can quickly become a nightmare. When faced with this issue, homeowners can call Premier Systems for the best furnace repair and maintenance services.

Even if your system has a minor leak, calling HVAC technicians is essential. When you call us, we don't waste any time coming to you with tools in hand, ready to diagnose and fix the leak. With routine maintenance, we can help prevent leaks from occurring again.

Bozeman, MT, residents can call our team today at 406-333-0177 for the best furnace maintenance contractors!

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How to Keep Your Indoor Air Clean When Wildfire Smoke Is in the Air

April 28, 2026

Wildfire season has become an increasingly common part of life in Southwest Montana, especially for homeowners in Bozeman, Belgrade, and Four Corners. While the smoky haze outside is easy to see, what’s happening inside your home is often less obvious. Many people assume that simply closing windows and doors will keep them safe—but wildfire smoke can still enter your home and impact your indoor air quality (IAQ) in ways that affect both comfort and health. Why Wildfire Smoke Indoors Is a Serious IAQ Concern Wildfire smoke is made up of extremely fine particles called PM2.5, which are small enough to pass through tiny openings and even some standard HVAC filters. Once inside your home, these particles can circulate through your ductwork and linger in the air. For homeowners in our area, poor indoor air quality during wildfire season can lead to: Coughing, sneezing, and throat irritation Headaches and fatigue Aggravated asthma or allergies Increased strain on your HVAC system Without proper filtration and system maintenance, your home’s air may not be as clean as you think. How Smoke Affects Your HVAC System Your HVAC system plays a major role in managing your indoor air quality —especially during wildfire events. When smoke enters your home, your system can either help remove harmful particles or unintentionally spread them throughout your space. If your system isn’t equipped with the right components, you may experience: Reduced filtration of fine smoke particles Dirty ductwork circulating contaminants Increased wear and tear on system components Decreased efficiency and airflow This is why homeowners across Bozeman and Belgrade are upgrading their systems to better handle wildfire smoke conditions. HVAC Solutions to Improve Indoor Air Quality During Wildfire Season The most effective way to protect your home’s air is through professional HVAC solutions designed specifically for indoor air quality in Four Corners, Belgrade, and Bozeman. Upgrade to HEPA or High-Efficiency Filters Standard filters aren’t designed to capture the smallest smoke particles. Upgrading to HEPA filters or high-MERV rated filters allows your system to trap significantly more airborne contaminants, improving your IAQ immediately. Install Whole-Home Air Purification Systems Advanced air purification systems integrate directly into your HVAC system to continuously clean the air as it circulates. These systems are especially effective during wildfire season when outdoor air quality is poor for extended periods. Add an Air Scrubber Air scrubbers go beyond traditional filtration by actively removing pollutants, odors, and particles from the air and surfaces in your home. This added layer of protection can make a noticeable difference in homes affected by wildfire smoke. Schedule Professional Duct Cleaning If smoke has entered your home, particles can settle inside your ductwork. Duct cleaning removes built-up contaminants and prevents them from being recirculated, helping restore cleaner air throughout your home. Keep Up with HVAC Tune-Ups Regular HVAC tune-ups ensure your system is running efficiently and filtering air properly. During wildfire season, a well-maintained system is critical for maintaining healthy indoor air quality. Long-Term Protection for Homes in Bozeman, Belgrade & Four Corners Wildfire smoke isn’t just a temporary inconvenience—it’s an ongoing challenge for homeowners in Southwest Montana. Investing in indoor air quality solutions through your HVAC system provides long-term protection for your home and your family. By combining: High-efficiency filtration Whole-home air purification Air scrubbers Clean ductwork Routine system maintenance …you can significantly reduce the impact of wildfire smoke indoors. Breathe Easier with the Right HVAC Support Your home should be a place where you can escape poor outdoor air—not bring it inside. With the right HVAC upgrades and maintenance, you can take control of your indoor air quality in Bozeman, Belgrade, and Four Corners, even during the peak of wildfire season. If you’re noticing smoke lingering in your home or want to prepare ahead of time, working with a trusted HVAC professional can help you choose the best solutions for cleaner, healthier air. Cleaner indoor air starts with the right system—and the right team behind it.