What to do to Prevent Your HVAC Unit from Freezing Up in the Winter

Professional Services Heating, AC & Electric Repair

December 22, 2021

As the temperature drops outside, homeowners rely on their HVAC system more than ever to keep their homes comfortable. When your heating system breaks, it is essential to schedule a repair as soon as possible as the minor issues can quickly escalate into more severe problems. 

 

When you face heating problems, HVAC services in Cedarburg from Professional Services will help restore your heater. Our licensed and experienced technicians understand the importance of having a working HVAC unit, especially during the winter months. We work hard to restore your heating system quickly and effectively so you can get back to enjoying the comfort of your home. 

 

One of the most common issues we see during the winter is a frozen HVAC system. This guide will help you prevent your HVAC unit freezing up in the winter. 


What Causes Your HVAC To Freeze?

You're not the only one that needs to stay warm during the winter. Unfortunately, when the temperature drops significantly, your HVAC unit is at risk of freezing. A frozen heating system cannot properly warm your home and can lead to permanent system failure. 


The Defrost Cycle

Although the goal is to avoid a completely frozen unit, you can expect your system to freeze occasionally throughout the winter. With the anticipation for low temperatures, your outdoor HVAC unit has a built-in defrost cycle which helps to prevent your unit from freezing. 

 

Your outdoor heating unit initiates the defrost cycle every hour, half-hour, or 90 minutes. To help prevent your HVAC system from freezing, the unit will blow cool air inside while releasing hot air outside.


Ice Buildup

Although the defrost unit can help keep your system functioning throughout the winter, extremely low temperatures and lack of maintenance can lead to a frozen system. 

 

A frozen heating system results from ice buildup on your outdoor coils. Your heating system's coils are an essential component that helps your unit heat your home. The coils heat the air that enters the system and releases the warm air back into your home. 

 

With excessive ice buildup, these coils cannot heat the air that passes over, preventing your heating system from warming your home. 


Common Signs of HVAC Problems

If you notice any of the following problems with your heating and air conditioning unit, don't hesitate to call the technicians at Professional Services:

 

  • A significant amount of ice is covering your HVAC unit 
  • Your coils have severe ice buildup
  • The unit is not pulling or releasing any air
  • Your HVAC unit does not effectively heat your home
  • You hear strange noises coming from the heating system

 

When it comes to fixing a frozen or malfunctioning unit, calling for professional expertise right away is critical. The licensed technicians at Professional Services understand the electrical and structural complexities of a heating system. Our goal is to provide a quick yet effective fix that ensures your unit will continue to work throughout the rest of winter. 


How Can You Fix a Frozen HVAC Unit?

When your HVAC freezes, it is essential to address the issue right away. Thankfully, there are troubleshooting steps that you can take before calling the professionals. 


Do Not Pour Hot Water on the Unit

Many homeowners will pour hot water on their unit for a quick defrost; however, this will do more harm than good. Instead of melting the ice or breaking it apart, follow these troubleshooting steps to restore heat.


Check the Air Filter

One of the most common culprits of HVAC system issues is a dirty air filter. Your unit's air filter removes unwanted dirt and debris from your home's air. Although this helps to improve your home's indoor air quality, it can lead to a clogged filter without proper unit maintenance. 

 

Over time, your air filter collects a significant amount of dust and debris. A clogged filter can cause your system to malfunction or lead to gradually increasing energy bills. If you notice problems with your heating system, check the air filter and replace it if needed. 


Check the Condensing Fan and Blower Motor

Similar to your unit's air filter, the condensing fan can collect a significant amount of dust and debris over time. A dirty condensing fan is unable to blow sufficient air. 

 

When your unit freezes, one of the first things to check is the blower fan. Without proper airflow, the coils are subject to condensation, leading to a frozen system.

 

If you suspect that your system's malfunctioning blower fan is the cause of the freezing unit, call Professional Services to schedule a repair as soon as possible. 


Check the Vents

The vents in your home are critical components of your heating system. If they collect excessive dust or debris, they can prevent your HVAC unit from producing sufficient airflow. This lack of airflow can lead to a frozen system. 

 

When your system freezes, check and clean the vents. It is important to frequently check your vents for debris buildup, especially during the winter. 


Check the Refrigerant Levels

Refrigerant is the liquid that runs through your system's coils. This liquid helps to cool or heat air that passes through your system. It is critical that your HVAC unit has the right amount of refrigerant to function correctly. 

 

If the refrigerant levels are too low, your HVAC system is subject to icing. When experiencing HVAC issues, fill the refrigerant to the level indicated by your unit. 

 

When checking refrigerant levels, also look around for leaks. If your system is leaking refrigerant, call Professional Services right away for an emergency repair service. 

 

Refrigerant is a critical part of your HVAC unit. However, the liquid is hazardous to people and pets, so it is vital to call for a repair as soon as you detect a leak. 


How Can You Prevent Your HVAC Unit from Freezing Up in Winter?

Proper maintenance is the best way to avoid your HVAC unit from freezing up in winter. Follow these simple yet effective maintenance steps to keep your heating system running through the winter.


  1. Change your air filter regularly. To keep your system efficient, change out the air filter at least once a month. Air filters are inexpensive and incredibly easy to install. 
  2. Clean the fan. Your system’s fan directs the air through the system and around your house. However, it can quickly collect dust or other debris like leaves and insects. When checking your HVAC unit, clear away any debris and make sure that your fan has nothing blocking it.
  3. Keep your vents open. Many homeowners are tempted to close a vent or two to lower their energy bill. However, this restricts airflow and can increase the likelihood of your HVAC unit freezing. Avoid closing more than two supply vents to promote proper airflow and keep your system running through the winter. 
  4. Keep the condenser coils clean. Outdoor units are especially susceptible to excessive debris. Frequently check your outdoor condenser coils and ensure they are clean of leaves, insects, and other debris. Keeping the condenser coils clean is critical to ensuring that your heating system continues to run efficiently.
  5. Schedule a professional inspection. One of the best ways to ensure that your system is ready to handle the drop in temperature is to let a professional HVAC technician take a look. The experts at Professional Services perform comprehensive system checks to ensure that there are no potential issues such as leaks or broken components. 


Professional and Effective HVAC Repairs

When it comes to heat and air condition systems, no one knows more than HVAC technicians. The HVAC experts at Professional Services understand the functional significance of every component. We aim to provide effective HVAC repair and maintenance services that keep your system running as long as possible. 


24/7 Emergency Services

You can't predict when your heating system will break down. That's why our team is available 24/7 for your emergency HVAC needs. An HVAC emergency is anything that you can't fix on your own and needs immediate attention, such as: 

 

No heat during the winter

Water or refrigerant leaks

HVAC unit won't turn on

No cool air during the summer

 

Whether it's 3 p.m. or 2 a.m., Professional Services is here when you need us. 


All of our repair services begin with a thorough inspection of your heating and cooling unit. We pay close attention to the various working components of your HVAC system to look for the cause and severity of the problem. Once we find the culprit, we put together an honest and affordable quote. 

 

When you have an HVAC unit freezing up in winter, it's best to let the professionals handle the repairs. Our trained technicians have the tools and expertise needed to repair your heating and cooling system safely and effectively. To avoid the dangers of DIY HVAC repair, let the technicians at Professional Services take care of your system. 

 

From minor fixes to extensive repairs, Professional Services in Port Washington, WI, has the tools and expertise you need. Call us at 262-435-5574 to schedule an inspection!

You might also like

How to Choose the Right Boiler for Your Cedar Grove, WI Home

August 31, 2026
When choosing the right boiler for a Cedar Grove, WI home, the first step is assessing heating needs and space size. In our service calls throughout Cedar Grove and the surrounding rural stretches of Sheboygan County, we regularly help homeowners evaluate different types of systems, like conventional and combi boilers, based on their home's specific requirements, and a professional boiler installation consultation is the best way to sort through the options. Energy efficiency ratings matter too, since the right choice can make a real difference on monthly bills. Proper maintenance also plays a big role in keeping a boiler running smoothly for years to come. Let's explore these key aspects to make an informed decision. Key Factors for Choosing the Right Boiler When thinking through the key factors for choosing the right boiler, it's vital to evaluate a home's heating needs alongside its energy efficiency. The size of the space matters first. A boiler that's too small won't heat effectively, while an oversized unit wastes energy and drives up costs unnecessarily. Fuel type is another consideration, since gas, oil, and electric options each come with their own benefits and cost structures depending on what's already available in a Cedar Grove home. Budget matters too, not just for the initial purchase but for long-term operating expenses down the road. The boiler's efficiency rating deserves close attention as well, since higher ratings generally mean lower energy bills and a smaller environmental footprint. Maintenance needs round out the picture. A reliable boiler should fit a household's lifestyle and offer reasonably easy upkeep. Working in homes across Cedar Grove, our team has seen how much smoother this decision goes with guidance from an experienced technician who knows the local housing stock. Understanding Different Boiler Types Understanding the different types of boilers is essential for making an informed choice. There are two primary categories: conventional and combi boilers. Conventional boilers, often called regular boilers, heat water in a storage tank and work well for larger homes where hot water demand runs high. They require more space but provide a consistent, reliable supply of hot water. Combi boilers, on the other hand, heat water on demand, making them space-efficient and well-suited to smaller homes. They skip the separate tank altogether, which can save on both installation costs and ongoing energy use. System boilers are worth considering too, since they combine features of both types. Each option comes with its own pros and cons, and understanding these differences helps homeowners identify what best suits their needs. Experienced HVAC contractors familiar with boiler installation can offer valuable insight into which type makes the most sense for a given home. As homeowners explore their options, it helps to keep in mind how each type aligns with the home's layout and daily routines. Determine the Right Boiler Size for Your Home How do you determine the right boiler size for a home? The process starts with assessing heating needs based on the square footage of the living space. A rough calculation of 30 to 60 BTUs per square foot is a common starting point, depending on climate and insulation quality. The number of rooms requiring heat and the ceiling height also factor in, since these impact overall heat loss. Home layout matters too. Open floor plans may need less heating capacity than segmented spaces with a lot of separate rooms. Older windows or poor insulation, both common in some of Cedar Grove's older farmhouses and rural properties, can mean a larger boiler is needed to compensate for heat loss. Hot water demand, like showers and laundry usage, rounds out the picture. Once this information is gathered, consulting with a professional through boiler maintenance and sizing guidance helps guarantee the right fit without wasting energy or overspending on unnecessary capacity. How Energy Efficiency Ratings Impact Your Boiler Choice Choosing a boiler that meets a home's needs isn't just about size. Energy efficiency ratings play an essential role in the decision too. These ratings affect monthly energy bills, environmental footprint, and overall comfort at home. A few key factors are worth weighing when evaluating efficiency: Annual Fuel Utilization Efficiency (AFUE): This percentage indicates how much fuel gets converted into usable heat. The higher the AFUE, the more efficient the boiler. Energy Star Certification: Boilers with this label meet strict energy efficiency guidelines set by the EPA, offering an added layer of confidence in the choice. Lifecycle Cost: While an energy-efficient boiler may carry a higher upfront cost, it often saves money over time through reduced energy bills and fewer repairs. Maintaining optimal humidity levels throughout a Cedar Grove home can further support overall energy efficiency alongside the right boiler choice. Maintenance Tips for Longevity and Performance Keeping a boiler running efficiently and extending its lifespan comes down to regular maintenance. Scheduling annual inspections with a certified technician is a strong first step, since it catches potential issues early before they turn into bigger repairs. Based on what we see in Cedar Grove properties, this single habit prevents more emergency calls than almost anything else. Checking the pressure gauge monthly and keeping it within the recommended range matters too, along with bleeding radiators periodically to remove trapped air and improve heat distribution throughout the home. Keeping the area around the boiler clear of debris supports proper airflow and reduces fire hazards, and the flue pipe should be checked periodically for blockages and confirmed to be securely attached. A full boiler service visit covers all of this and more, and maintaining a consistent heating schedule while avoiding drastic temperature swings helps reduce strain on the system overall. Finding the Boiler That Fits Your Home for the Long Haul Choosing the right boiler for a Cedar Grove home means balancing comfort with efficiency, without sacrificing one for the other. While a high-efficiency model may come with a bigger investment upfront, it often pays off in long-term savings and reliable warmth through even the coldest Wisconsin winters. By weighing both immediate needs and future benefits, homeowners can find a boiler that truly fits their household for years to come. When you're ready to take the next step, our team at Professional Services Heating, AC & Electric Repair is here to help guide the decision, so feel free to schedule your service today .

Aluminum Wiring in Thiensville, WI Homes: Why It's a Fire Risk and How Rewiring Fixes It

August 31, 2026
Aluminum wiring in Thiensville, WI homes poses serious fire risks due to its inefficiency and tendency to overheat. In our service calls throughout Thiensville, from homes near the Milwaukee River to properties along the village's older residential streets, we often find aluminum wiring that can lead to poor connections and oxidation, increasing the chances of electrical arcing. Homeowners should be on the lookout for signs like flickering lights or frequent circuit breaker trips, and a professional electrical inspection is the safest way to confirm what's really going on behind the walls. Replacing aluminum wiring with copper through professional service can greatly enhance safety and efficiency. Let's explore how this process can help safeguard your home. Why Aluminum Wiring Poses Fire Risks in Your Home When considering the safety of a home, one vital factor often overlooked is aluminum wiring. While it was commonly used in the past, homeowners need to recognize that aluminum can present serious fire risks. Unlike copper, aluminum wiring doesn't conduct electricity as efficiently, which can lead to overheating at connections. This overheating can cause wire insulation to break down, increasing the chance of electrical arcing and, ultimately, fires. Aluminum is also prone to oxidation, which can create resistance at connections, further compounding the risk. These issues can go unnoticed until it's too late, which is why being proactive matters so much. If aluminum wiring is suspected anywhere in the home, it's wise to consult a licensed professional rather than waiting for a visible problem to appear. Addressing this issue promptly helps guarantee the safety and comfort of a living space, avoiding potential hazards down the line. Homes with outdated wiring are notably more likely to experience an electrical fire, which underscores just how urgent this matter can be. Working in homes across Thiensville, our team treats aluminum wiring concerns as a priority every time they come up. Signs You Might Have Aluminum Wiring Recognizing the signs of aluminum wiring is essential for guaranteeing a home's safety. One red flag is the age of the wiring. Homes built between the 1960s and 1970s, which describes a good number of properties throughout Thiensville, are more likely to have aluminum wiring somewhere in the system. Another indicator is the presence of aluminum-rated outlets and switches, often marked with a label stating "Aluminum." Flickering lights or frequent circuit breaker trips can also signal issues related to aluminum wiring. Unusual heat at outlets or switches is worth paying attention to as well, since it can indicate poor connections. Corrosion on any exposed wires is a strong sign that aluminum wiring is present. Based on what we see in Thiensville properties, a thorough inspection covering the entire electrical system is the most reliable way to catch these hazards early, rather than waiting for a single warning sign to escalate. How Professional Services Can Safely Rewire Your Home If aluminum wiring is suspected in a home, rewiring is essential for both safety and peace of mind. At Professional Services Heating, AC & Electric Repair, our team recognizes the unique challenges aluminum wiring presents. Our certified electricians are trained to handle these specific issues, ensuring a safe and efficient rewire from start to finish. The process begins with a thorough assessment of the current wiring system, identifying any problem areas throughout the home. Once there's a clear picture, our team develops a tailored plan to replace the aluminum wiring with safer, more reliable copper alternatives. Throughout the process, we prioritize transparent communication and keep homeowners informed at every step. Our team works efficiently to minimize disruption to daily life, and our comprehensive electrical services make sure every aspect of the system is brought up to code. With our ongoing maintenance plans, we can also help protect the new wiring for the long term. Choosing Professional Services Heating, AC & Electric Repair means investing in a secure, worry-free home. What to Do If You Suspect Aluminum Wiring Aluminum wiring can pose serious safety risks, so it's important to act quickly if it's suspected in a home. The first step is recognizing the signs, like frequent circuit breaker trips or flickering lights. If these issues show up, it's best to avoid using the affected circuits and to steer clear of any DIY fixes. Instead, contacting a licensed electrician is the safest path forward for a proper assessment. Visible connections or splices that appear corroded or loose are significant red flags worth noting as well. Documenting these concerns ahead of time can help an electrician provide a more thorough evaluation during the visit. Understanding the potential hazards of aluminum wiring helps homeowners make more informed decisions about their safety. Scheduling a carbon monoxide and smoke detector check alongside an electrical inspection is also a smart way to round out a home's overall safety picture, since faulty wiring and detection gaps often go hand in hand. Taking these steps seriously helps protect homes and the people living in them. Benefits of Choosing Professional Services for Aluminum Wiring Rewiring When it comes to rewiring aluminum wiring, choosing Professional Services Heating, AC & Electric Repair means making a smart, safe choice for your home. Our team of certified professionals understands the unique challenges aluminum wiring presents, ensuring the rewiring is done correctly and safely. This expertise not only helps prevent potential fire hazards but also enhances a home's overall electrical efficiency, something especially valuable heading into a Wisconsin winter when electrical systems work harder to support heating and lighting demands. With 24/7 emergency service, homeowners can rest easy knowing help is just a call away. Our thorough maintenance plans protect that investment over time while keeping costs predictable, and we prioritize transparent communication so homeowners are always in the loop about the process and the costs involved. Protecting Your Thiensville Home From Wiring Hazards Aluminum wiring is one of those hidden risks that can sit quietly in a home for years before becoming a real problem, and that's exactly why it deserves attention sooner rather than later. Skipping the risk and choosing safety instead means trading unreliable aluminum for wiring built to last. By rewiring with a trusted local team, Thiensville homeowners can make sure their home stays a safe, comfortable place for years to come. If you're ready to take that step, our team at Professional Services Heating, AC & Electric Repair is here to help, so don't hesitate to contact our team today .

Boiler Leaking Water in Port Washington, WI? Common Causes and How to Fix Them

August 31, 2026
If a boiler starts leaking water in Port Washington, WI, it's not something to wait on. In our service calls throughout Port Washington, from homes near the harbor to properties further out toward the county line, common causes include faulty pressure relief valves, corrosion, or loose connections. The safest first step is to shut off the boiler and the water supply, then have a professional conduct a proper boiler repair visit rather than attempting fixes on the system yourself. If the issue persists or strange noises show up, it's time to bring in professional help. Let's explore more on identifying these leaks and what to expect from a proper fix. Common Signs of a Boiler Leak You Shouldn't Ignore When it comes to boiler leaks, certain warning signs shouldn't be overlooked. Water pooling around the boiler is one of the clearest red flags a homeowner can spot. Unusual noises, like hissing or gurgling, can also signal trouble developing inside the system. Rust or corrosion appearing on the boiler's surface is another sign worth taking seriously rather than dismissing. Fluctuating heating temperatures can point to a leak too, as the system struggles to maintain efficiency while losing water. A sudden increase in the water bill is often an overlooked clue that points to a hidden leak somewhere in the system. Working in homes across Port Washington, our team has found that regular boiler maintenance programs catch most of these issues well before they escalate into something bigger. What Causes a Boiler to Leak Water? Boilers can leak water for several reasons, and understanding these causes helps prevent more serious issues down the line. One common culprit is a faulty pressure relief valve, which can fail and lead to leaks over time. Corrosion in the boiler tank or pipes is another frequent issue, often tied to age or mineral buildup that's common in older Port Washington homes. Loose fittings or connections can also loosen gradually, allowing water to escape. Sediment buildup is worth watching for too, since it can create blockages that increase pressure and eventually cause leaks. A malfunctioning pump can lead to water accumulation as well. Based on what we see in Port Washington properties, identifying these problems early through a professional boiler maintenance visit makes a real difference in avoiding costlier repairs down the road. If any signs of leaking show up, the best move is consulting a professional to diagnose and address the issue promptly rather than letting it linger. Diagnosing Your Boiler Leak: What to Look For Noticing a leak in a boiler can be concerning, especially once potential causes like faulty valves or corrosion come into play. A proper diagnosis starts with checking the area around the boiler for visible signs of water, which helps pinpoint the source. The pressure gauge gets checked next, since an unusually high reading can point to an underlying problem. Pipes get examined for damp spots or rust, both of which can signal a developing leak, and fittings and connections are inspected closely, since loose or damaged components are a frequent cause of water escape. The drain valve is checked to confirm it's closed properly, and any unusual noises, like hissing or gurgling, are worth investigating further as part of a complete evaluation. This kind of thorough diagnostic work is exactly why a professional visit makes more sense than guesswork, and our team makes sure the process is handled at a fair, transparent price for every Port Washington homeowner we work with. What Happens During Professional Boiler Leak Repair Once a leak is discovered, taking swift action matters, and that action is best handled by a trained technician rather than through home repairs. The boiler and water supply get shut off first to prevent further damage. From there, a technician checks the pressure gauge and releases pressure through the proper valve if needed to bring the system back to a safe level. Visible pipes and connections get a close inspection for wear or loose fittings, since tightening these components correctly is a job that calls for the right tools and training. If corrosion is present, it gets addressed properly rather than papered over with a temporary patch, and any sealant or repair work follows manufacturer specifications to make sure the fix holds. The boiler then gets monitored to verify the leak has been fully resolved, giving homeowners confidence that the system is back to safe, reliable operation rather than facing a repeat issue down the line. When to Hire an Expert for Boiler Leak Repairs When is it time to call in a professional for boiler leak repairs? Persistent leaks or a noticeable drop in water pressure are both signs that shouldn't be ignored. Visible corrosion or rust is another reason to bring in an expert without delay. A decline in the boiler's overall performance, like strange noises or irregular heating, is worth a professional look too. If there's any uncertainty about the cause, it's always safer to let a certified technician handle the diagnosis and repair. Professional Services Heating, AC & Electric Repair offers 24/7 emergency assistance for exactly these situations, giving Port Washington homeowners peace of mind day or night. With the right expertise, the issue gets diagnosed accurately and resolved with a lasting solution. Keeping Your Boiler Running Reliably All Winter Fixing a leaking boiler is a bit like patching a hole in a boat. Ignore it, and the situation only gets worse. By addressing the issue promptly and understanding its causes, Port Washington homeowners can keep their homes warm and comfortable even through the harshest Wisconsin winters. If a leak persists despite basic checks, don't hesitate to call in the experts. Our team at Professional Services Heating, AC & Electric Repair is ready to help, so feel free to contact our team today .

Book a Service Today