Your heat pump is usually pretty good at telling you when something is wrong—you just have to know how to listen. Is it making a strange grinding or squealing noise that it never used to? Have you noticed your energy bills creeping up for no apparent reason? Maybe your home just doesn’t feel as comfortable as it should, leaving you constantly fiddling with the thermostat. These are all signs that your system is struggling. This article will help you decode those warning signs, explaining what they mean and what you should do next. We’ll cover everything from simple troubleshooting steps to the clear indicators that you need an expert heat pump repair to restore your home’s comfort.
Key Takeaways
- Troubleshoot the simple stuff first: Before calling a technician, check for dead thermostat batteries, a dirty air filter, and blocked vents. These quick fixes solve many common heat pump issues and can save you the cost of a service call.
- Recognize when to call a professional: Don’t ignore serious warning signs like loud grinding noises, heavy ice buildup, or a repeatedly tripping circuit breaker. These symptoms point to complex problems that require an expert for a safe and accurate repair.
- Weigh repair costs against replacement value: Use the 50% rule as a guide—if a repair costs half as much as a new system, replacement is usually the smarter investment, especially if your heat pump is over 10 years old.
What’s Wrong With My Heat Pump? Common Issues Explained
Heat pumps are fantastic, all-in-one systems for keeping your home comfortable year-round. But like any hard-working appliance, they can run into trouble. When your heat pump starts acting up, it’s easy to assume the worst, but often the culprit is a surprisingly simple issue. From a thermostat with dead batteries to a filter that’s overdue for a change, many common problems have straightforward solutions that don’t require a major repair bill.
Understanding what might be going wrong is the first step toward getting your system back on track. Knowing the difference between a minor glitch and a serious malfunction can save you time, money, and a lot of stress. Below, we’ll walk through some of the most frequent heat pump hiccups we see here in the Winston-Salem area. Some of these are quick checks you can perform yourself in just a few minutes, while others are clear signs it’s time to call in a professional for a residential HVAC service. Pinpointing the problem can help you know what to expect and ensure your home is back to being the comfortable retreat it should be.
Thermostat Glitches and Incorrect Settings
Before you panic, start with the simplest explanation: your thermostat. As the brain of your HVAC system, a small issue here can cause big-feeling problems. First, make sure it’s set to “heat” and the temperature is set higher than the current room temperature. It sounds obvious, but it’s a common oversight! If your heat pump is turning on and off too frequently—a problem known as short cycling—the thermostat is a good place to check. Try replacing the batteries. A low battery can send faulty signals to your system, causing it to behave erratically. This simple step can often resolve the issue without needing a service call.
Frozen Coils and Pesky Ice Buildup
Seeing ice on your outdoor unit during a cold North Carolina winter can be alarming, but it’s not always a sign of disaster. Heat pumps naturally form a light layer of frost and have a built-in defrost cycle to melt it. However, if the unit is covered in a thick sheet of ice or the ice doesn’t go away, you have a problem. This can be caused by blocked air vents, a dirty filter restricting airflow, or a failing part. If you see ice, check that nothing is blocking the unit. If it stays frozen after you’ve cleared any obstructions, it’s time to call a professional to prevent damage.
Blocked Airflow from Dirty Filters
One of the most common—and preventable—causes of heat pump failure is a dirty air filter. When the filter gets clogged with dust, pet dander, and other debris, it chokes the airflow your system needs to operate efficiently. This strain can lead to overheating, reduced performance, and even a complete shutdown. You should plan to replace your HVAC filters every one to three months. It’s also a good idea to walk through your home and make sure your supply and return vents aren’t blocked by furniture, rugs, or curtains. Proper airflow is essential for both heating efficiency and the longevity of your system.
Constant On-and-Off (Short Cycling) and Electrical Faults
If your heat pump turns on and off every few minutes without actually heating your home, it’s short cycling. This wastes energy and puts excessive wear and tear on the components. While a dirty filter can cause this, it can also point to an electrical issue. If the system has no power at all, your first stop should be your home’s electrical panel. A tripped circuit breaker might be the cause. You can try resetting it once, but if it trips again, don’t keep flipping the switch. A repeatedly tripping breaker signals a deeper electrical problem that requires a certified technician to diagnose and repair safely.
Low Refrigerant Levels from Leaks
Is your heat pump running, but the air coming out of the vents feels cool or lukewarm? This is a classic sign of low refrigerant. Refrigerant is the substance that absorbs and releases heat, and it runs in a closed loop. If the level is low, it means there’s a leak somewhere in the system. This isn’t a DIY fix. Handling refrigerant requires special tools and certification, and simply adding more won’t solve the underlying problem. A professional technician will need to find and repair the leak before recharging the system to the correct level, ensuring your residential heating and cooling system works correctly.
Signs Your Heat Pump Needs a Professional’s Help
Some heat pump issues are simple enough to troubleshoot on your own, but many problems are clear signals that it’s time to call in a professional. Ignoring these warning signs can turn a small, fixable issue into a major system failure, leading to more expensive repairs or even a full replacement. Your heat pump is usually pretty good at telling you when something is wrong—you just have to know what to look and listen for. If you notice any of the following signs, it’s best to schedule a service call with a trusted technician who can handle your residential HVAC needs. Catching these problems early protects your system, your comfort, and your wallet.
Your Home Feels Too Hot or Too Cold
The most obvious sign of a problem is when your heat pump simply isn’t doing its job. If you find yourself constantly adjusting the thermostat because rooms feel stuffy and warm in the summer or chilly in the winter, your system is struggling. This inability to maintain a comfortable, consistent temperature means something is preventing it from operating at full capacity. The cause could range from low refrigerant to a failing compressor. Instead of layering up or turning on a fan, treat this as a clear indicator that your heat pump needs a professional diagnosis to get your home comfortable again.
Strange Noises: Squealing, Grinding, or Banging
Your heat pump should operate with a relatively quiet hum. If you start hearing loud, unusual sounds, pay close attention. Squealing or screeching noises often point to a problem with the motor bearings, while a grinding sound can indicate a more serious internal mechanical issue. Loud banging or clanking might mean a part has come loose inside the unit. These aren’t sounds you should get used to. Turn the system off to prevent further damage and call a technician to investigate before a failing component causes a complete breakdown.
You See Frost, Ice, or Water Leaks
A little frost on your outdoor unit during a cold winter day can be normal, but a heavy buildup of ice is a red flag. Ice can indicate a problem with the defrost cycle, restricted airflow, or low refrigerant levels. This is a serious issue because it forces the system to work much harder and can severely damage the compressor. Similarly, if you notice water pooling around your indoor air handler, you could have a clogged drain line or another internal problem. Don’t ignore any signs of ice or leaks—they require immediate professional attention.
Your Energy Bills Suddenly Spike
A heat pump is supposed to be an efficient way to heat and cool your home, so an unexpected jump in your utility bills is a major warning sign. If your usage habits haven’t changed but your bill is significantly higher, it often means the system is working overtime to compensate for an internal problem. This loss of efficiency could be caused by anything from a refrigerant leak to a struggling motor. Scheduling a professional inspection can identify the root cause, and a timely repair can lower your energy costs. Regular tune-ups through a service maintenance program can also keep your system running efficiently.
The System Shuts Down Unexpectedly
If your heat pump turns off randomly or trips the circuit breaker, you have a problem that needs to be addressed. While you can try resetting the breaker once, if it trips again, don’t keep flipping the switch. A repeatedly tripping breaker often signals an electrical issue within the heat pump, such as a short in the wiring or a failing motor that is drawing too much power. Electrical problems are not safe to handle on your own. For your safety and to prevent further damage to your system, it’s crucial to have a qualified technician diagnose and resolve the issue.
Quick Fixes to Try Before You Call for Service
When your heat pump acts up, it’s easy to assume the worst—and picture a hefty repair bill. But before you pick up the phone, there are a few simple troubleshooting steps you can take on your own. Often, the culprit is something minor that you can fix in just a few minutes, saving you time, money, and a whole lot of stress. Think of this as your pre-call checklist. Walking through these quick fixes can help you either solve the problem yourself or gather more specific information for your technician, which always leads to a faster, more accurate repair. From a dead thermostat battery to a clogged air filter, these common issues can mimic more serious problems. Taking a moment to check these things first is a smart move for any homeowner. If you try these steps and your system still isn’t working, you’ll know for sure that it’s time to bring in a professional for a closer look.
Check Your Thermostat Settings and Batteries
First things first, let’s look at your heat pump’s command center: the thermostat. It might sound obvious, but it’s surprising how often an incorrect setting is the root of the problem. Make sure your thermostat is set to “heat” or “cool” as needed and that the temperature is adjusted correctly. If the screen is blank or the system isn’t responding, the batteries could be the issue. Most digital thermostats run on AA or AAA batteries that need to be replaced every couple of years. Swapping them out is a simple fix that could save you the cost of a service call. If new batteries don’t solve the problem, you might need professional residential HVAC help.
Clean or Replace the Air Filter
Your heat pump needs to breathe, and a dirty air filter is like trying to run a marathon while breathing through a straw. When the filter gets clogged with dust, pet dander, and other debris, it restricts airflow. This forces your system to work much harder, leading to poor performance, higher energy bills, and even a complete shutdown. Check your air filter and replace it if it looks dirty. As a general rule, you should change your HVAC filters every three to six months, or more often if you have pets or allergies. This simple task is a cornerstone of our Service Maintenance Programs because it has such a huge impact on your system’s health and efficiency.
Inspect the Circuit Breaker
If your heat pump has lost power completely, the next stop is your home’s electrical panel. Find the circuit breaker that controls your HVAC system. Sometimes, a power surge can cause the breaker to “trip,” cutting off electricity to the unit as a safety measure. If the switch is in the middle or “off” position, flip it firmly to “off” and then back to “on.” Wait about ten minutes to see if the system powers back up. If the breaker trips again right away, don’t keep resetting it. A repeatedly tripping breaker is a sign of a more serious electrical issue that requires a professional technician to diagnose and repair safely.
Make Sure Vents Are Open and Unblocked
Proper airflow is critical for your heat pump to heat or cool your home evenly. Take a quick walk through your house and check all the supply and return vents. Make sure they are open and not blocked by furniture, rugs, curtains, or anything else. A blocked vent can disrupt the air pressure in your system and prevent conditioned air from circulating where it needs to go. In rooms where doors are often closed, air can have trouble returning to the main unit. According to the Department of Energy, ensuring air can flow freely is key to efficient operation and overall comfort.
Let Frozen Coils Thaw on Their Own
Seeing ice on your outdoor unit can be alarming, but it’s not always a sign of trouble. In colder weather, it’s perfectly normal for your heat pump to occasionally run a “defrost mode” to melt away frost that has formed on the coils. During this cycle, which usually lasts about 5-10 minutes, the outdoor fan will stop, but you’ll still hear the compressor running. You might even see a puff of steam rising from the unit, which looks like smoke but is just water vapor. The best thing you can do is let it finish its cycle. If the ice doesn’t melt or seems to be getting thicker, then it’s time to call for service. You can even schedule a Virtual Tele-Tech appointment to get a quick expert opinion.
What to Expect: The Cost of Heat Pump Repairs
When your heat pump stops working, one of the first questions that comes to mind is, “How much is this going to cost?” It’s a fair question, and the answer depends entirely on what’s wrong with the system. A simple fix is a lot different from a major component failure. While it’s impossible to give a precise quote without diagnosing the problem, we can walk through the common costs and factors that influence your final bill. This way, you’ll have a clearer picture of what to expect when you call for a repair.
Breaking Down Costs for Minor vs. Major Fixes
Heat pump repair costs can range from a minor inconvenience to a significant investment. A small issue, like a faulty electrical connection or a bad capacitor, might only set you back a couple of hundred dollars. These are the quick fixes that get your system back up and running without too much fuss. On the other hand, a major repair, like replacing the compressor—the heart of your heat pump—can cost upwards of $2,000. An average repair, such as replacing a fan motor, typically falls somewhere in the middle. The key is to get an accurate diagnosis from a professional to understand exactly what you’re dealing with.
Common Component Replacement Costs
The specific part that needs to be replaced is the biggest driver of your repair bill. A minor fix involving a simple component might cost you less than $100, while more complex parts naturally come with a higher price tag for both the component and the labor to install it. For example, replacing a thermostat is very different from replacing a reversing valve or the outdoor coil. When you get a quote from a technician, it will include the cost of the part itself and the time required to complete the repair. At QRC, we provide clear, upfront pricing for all our residential HVAC services so you know exactly what to expect.
Factors That Influence Your Final Bill
Several factors can affect the total cost of your heat pump repair. If your system is still under warranty, some parts may be covered, which can significantly lower your out-of-pocket expense. The age and overall condition of your unit also play a huge role. As a general guideline, if your heat pump is less than 10 years old and the repair cost is less than 50% of the price of a new system, fixing it is usually the smart move. If it’s older, requires frequent repairs, or is facing a costly fix, it might be time to consider a replacement. Our Virtual Tele-Tech appointments are a great way to evaluate your options without any pressure.
Understanding Emergency Service Fees
When your heat pump fails in the middle of a cold night or a sweltering weekend, you need help right away. Emergency repairs often come with higher costs because they happen outside of standard business hours. This premium covers the technician’s immediate availability to restore your comfort and safety. While nobody likes unexpected expenses, having access to 24/7 service is a lifesaver when you need it most. The best way to avoid surprise breakdowns and emergency fees is by staying on top of routine maintenance. Our Service Maintenance Programs are designed to keep your system in peak condition and catch small issues before they become big problems.
Repair or Replace? How to Make the Right Call
Deciding whether to fix your heat pump or invest in a new one is a major decision. It’s not just about the upfront cost; it’s about your home’s comfort, your energy bills, and your peace of mind for years to come. There’s no single right answer for everyone, but a few trusted guidelines can help you weigh the pros and cons. Thinking through your system’s age, the cost of the repair, and its history of breakdowns will give you a much clearer picture. If you’re feeling stuck, a professional evaluation can provide the data you need to make a confident choice. You can even get a preliminary assessment with a Virtual Tele-Tech appointment to walk through your options with an expert.
The 10-Year Rule: Is Your Heat Pump Too Old?
A well-maintained heat pump typically lasts about 10 to 15 years. If your system is approaching or has passed the 10-year mark, you should think carefully before sinking money into a significant repair. As a heat pump ages, its efficiency declines, and major components start to wear out. Investing hundreds or even thousands of dollars into a unit that’s already near the end of its expected lifespan often isn’t the most economical choice. It’s better to put that money toward a new, reliable system that will last you another decade or more.
The 50% Rule: When a Repair Isn’t Worth the Cost
Here’s a simple but effective rule of thumb to guide your decision: if the cost of a repair is 50% or more of the cost of a new heat pump, replacement is almost always the better option. For example, if a new system costs $6,000 and you’re facing a $3,000 repair bill, it makes more financial sense to replace the unit. This rule is especially helpful when dealing with an older system. A minor, inexpensive fix on a newer unit is one thing, but pouring a large sum of money into an aging heat pump is a gamble that rarely pays off.
Considering the Frequency of Breakdowns
Is your HVAC technician becoming a regular visitor? If you’ve had to call for multiple repairs over the last couple of years, it’s a strong sign that your heat pump is on its last legs. Those service calls add up quickly, and what seems like a series of small problems often points to a larger, systemic failure. Instead of continuing to patch up a failing system, replacing it provides a fresh start with reliable performance. While our Service Maintenance Programs can prevent many issues, constant breakdowns on an old unit mean it’s time for an upgrade.
Weighing Long-Term Energy Savings
Don’t forget to factor future energy costs into your decision. Heat pump technology has advanced significantly, and today’s models are far more energy-efficient than those from a decade ago. Upgrading to a new, high-efficiency system can lead to substantial savings on your monthly utility bills. While the initial investment is higher than a repair, the long-term energy savings can help offset the cost over the life of the unit. Modern residential HVAC systems are an investment in your home’s comfort and your wallet.
Why You Should Leave Heat Pump Repairs to the Pros
While it can be tempting to roll up your sleeves and tackle a home repair yourself, a heat pump isn’t the place to test your DIY skills. These systems are complex machines, handling both heating and cooling through a sophisticated mix of electrical components, refrigerant lines, and mechanical parts. What might seem like a straightforward fix on the surface could be a symptom of a much larger issue, and a misstep can lead to more expensive damage or, worse, a serious safety hazard.
Calling a professional isn’t about admitting defeat; it’s about making a smart, safe decision for your home and family. A certified technician has the specialized training, diagnostic tools, and hands-on experience to accurately identify the root cause of the problem and perform the repair correctly the first time. This not only gets your system back up and running faster but also protects your investment, ensures your warranty remains valid, and gives you peace of mind knowing the job was done right. When it comes to your home’s comfort and safety, some jobs are simply best left to the experts.
Avoiding the Dangers of DIY Electrical Work
Your heat pump is a powerful electrical appliance, and attempting to fix it without proper training can be incredibly dangerous. One wrong move could lead to electrical shock or even create a fire hazard. If you hear strange noises like constant clicking, grinding, or squealing, it’s your system’s way of telling you something is seriously wrong internally. These sounds often point to electrical or mechanical failures that require a professional’s touch. Instead of reaching for a toolbox, your first step should be to call a trusted residential HVAC technician who can safely diagnose and resolve the issue.
Getting an Accurate Diagnosis with the Right Tools
Guessing what’s wrong with your heat pump can lead you down a rabbit hole of wasted time and money. Professionals arrive with specialized equipment designed to pinpoint the exact problem. They can run tests on electrical components, accurately check refrigerant levels, and measure airflow to get a complete picture of your system’s health. This expertise ensures they find the true source of the issue, not just the most obvious symptom. An accurate diagnosis is the key to an effective and lasting repair, preventing you from paying for fixes that don’t solve the underlying problem.
Protecting Your Warranty and Ensuring Compliance
Did you know that a DIY repair could void your heat pump’s warranty? Most manufacturers require that any service or repairs be performed by a certified professional to keep the warranty valid. Attempting a fix on your own can leave you on the hook for the full cost of future breakdowns. Professional service not only protects your warranty but also ensures your system continues to run at peak efficiency, saving you money on energy bills. Enrolling in regular service maintenance programs is the best way to keep your system in top shape and your coverage intact.
Finding a Lasting Solution, Not a Quick Patch
When your heat pump breaks down, you need to know if a repair is a smart investment or just a temporary band-aid. A professional technician can give you an honest assessment. For a newer unit with a minor issue, a repair is often the best choice. However, if your system is over a decade old, needs frequent repairs, or faces a repair bill that’s close to half the cost of a new unit, replacement might be the more sensible long-term solution. An expert can help you weigh these factors to find a lasting solution that fits your budget and comfort needs.
How to Choose the Best Heat Pump Repair Service
When your heat pump stops working, the last thing you want is the added stress of finding a trustworthy technician. Knowing what to look for ahead of time can make the process much smoother. A great repair service isn’t just about fixing the immediate problem—it’s about providing peace of mind through expertise, transparency, and reliability. You want a team that respects your home, understands your system, and communicates clearly from start to finish.
Choosing the right partner for your residential HVAC needs means looking beyond a quick fix. It’s about finding a company you can count on for the long haul, whether it’s for an emergency repair on a freezing night or routine maintenance to keep things running efficiently. By focusing on a few key qualifications, you can confidently select a service that will get the job done right and keep your home comfortable all year round.
Look for Licensed, Insured, and Certified Techs
First things first: never let an unlicensed or uninsured technician work on your heat pump. Proper licensing ensures the company meets state and local standards, while insurance protects you from liability in case of accidents. Beyond the basics, look for technicians with advanced certifications, like those from NATE (North American Technician Excellence). This tells you they’ve passed rigorous exams and are committed to staying current with HVAC technology. A certified professional can diagnose complex issues accurately and perform repairs that last, giving you confidence in the quality of their work.
Confirm Emergency Availability and Clear Pricing
Heat pumps rarely break down at a convenient time. That’s why it’s so important to find a company that offers emergency service, ideally 24/7. Knowing you have someone to call during a weekend cold snap or a sweltering holiday provides incredible peace of mind. Just as important is pricing transparency. A reputable company will always provide a clear, detailed estimate before any work begins. This breakdown should outline the costs for parts, labor, and any other fees, so you aren’t hit with surprise charges on the final bill.
Find a Team with Local Winston-Salem Expertise
A company that’s local to the Winston-Salem area brings a unique advantage. Technicians familiar with North Carolina’s climate understand the specific demands placed on your heat pump, from humid summers to unpredictable winters. They know the common problems that arise in our region and can often diagnose issues more quickly. A local team is also more invested in its community’s reputation and can provide faster response times. When you need reliable commercial services, choosing a provider with deep roots in the area ensures you get service tailored to your environment.
Ask About Service Guarantees and Maintenance Plans
A confident company will always stand behind its work. Ask potential repair services about their warranties or guarantees on both parts and labor. This shows they believe in the quality of their repairs and gives you recourse if the same issue pops up again. It’s also a great idea to ask about their Service Maintenance Programs. Enrolling in a maintenance plan is one of the best ways to prevent future breakdowns, improve your system’s efficiency, and extend its lifespan, saving you money and hassle over time.
Keep Your Heat Pump Healthy for Years to Come
Your heat pump is one of the hardest-working appliances in your home, pulling double duty to keep you comfortable all year. A little proactive care goes a long way in preventing surprise breakdowns and expensive repairs. By staying on top of a few simple tasks and knowing what to look for, you can extend your system’s lifespan and keep it running efficiently. Think of it as a partnership—give your heat pump the attention it needs, and it will reward you with reliable comfort and lower energy bills.
The Importance of a Regular Maintenance Schedule
Just like your car, your heat pump needs regular tune-ups to perform at its best. Sticking to a maintenance schedule is the single most effective thing you can do to prevent major problems. It keeps your system running efficiently, which saves you money on energy costs month after month. Plus, many manufacturer warranties require proof of annual maintenance to remain valid. Skipping a tune-up could mean you’re on the hook for a costly repair that would have otherwise been covered. Our service maintenance programs are designed to make this easy, handling all the technical checks so you can have peace of mind.
Simple Seasonal Checks You Can Perform
You don’t have to be an HVAC expert to handle a few basic upkeep tasks. First, check your thermostat batteries. If the screen is blank or the system won’t turn on, a simple battery swap might be all you need. Next, inspect your air filter monthly and replace it when it looks dirty—usually every 3-6 months. A clogged filter restricts airflow and forces your system to work harder. Finally, take a walk outside and check on your outdoor unit. Make sure there’s at least three feet of clear space around it, removing any leaves, branches, or debris that could block airflow.
Warning Signs to Watch for All Year
Your heat pump will often give you clues when something is wrong. Pay attention to any unusual sounds, like grinding, squealing, or constant clicking. If you notice the system turning on and off more frequently than usual (a problem called short cycling), that’s another red flag. A sudden, unexplained spike in your utility bills can also signal that your heat pump is losing efficiency. And, of course, if your home just isn’t staying comfortable or you spot ice forming on the outdoor unit, it’s time to call a professional for a diagnosis.
How a Professional Tune-Up Pays for Itself
While DIY checks are helpful, they can’t replace a professional inspection. During a tune-up, a certified technician will clean the coils, check refrigerant levels, test electrical connections, and inspect all the moving parts that you can’t see. According to the U.S. Department of Energy, a well-maintained heat pump can use 10% to 25% less energy than a neglected one. That efficiency boost often means the service pays for itself in energy savings over time, all while preventing the kind of wear and tear that leads to major breakdowns.
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Frequently Asked Questions
How often should I really change my air filter? The standard advice is every one to three months, but it really depends on your home. If you have pets that shed or family members with allergies, you should check it monthly. A good rule of thumb is to hold the filter up to a light. If you can’t see light passing through it, it’s definitely time for a new one. A clean filter is the easiest way to keep your system healthy.
Is it normal for my heat pump to run constantly when it’s very cold outside? Yes, this can be perfectly normal. Unlike a furnace that blasts hot air in short bursts, a heat pump is designed to provide a steady, consistent stream of warmth. When the outdoor temperature drops significantly, your system has to work longer to maintain the temperature you’ve set on your thermostat. As long as your home feels comfortable and the air from the vents is warm, a long run time isn’t usually a cause for concern.
My thermostat has an ’emergency heat’ setting. When should I use it? You should only use the emergency heat setting if your heat pump has stopped working entirely and you’re waiting for a technician. This setting activates a secondary electric resistance heater, similar to the coils in a toaster. It’s much less efficient and far more expensive to run than your heat pump, so think of it as a true backup for emergencies only, not as a way to heat your home faster.
Why can’t I just top off the refrigerant myself if it’s low? Refrigerant isn’t like oil in a car; it doesn’t get “used up.” If the level is low, it means there is a leak somewhere in the system. Simply adding more won’t fix the underlying problem, and the new refrigerant will just leak out again. Plus, handling refrigerant requires special certification and tools to do it safely and legally, as it can be harmful to you and the environment if released improperly.
What’s that loud noise and steam coming from my outdoor unit in the winter? That’s most likely your heat pump’s defrost cycle in action. When it’s cold and damp, frost can build up on the outdoor coils. To melt it, the system temporarily reverses itself, which can cause a whooshing sound and produce a cloud of steam that looks like smoke. This is a normal and necessary function that usually lasts for about 10 minutes. If the unit becomes encased in thick ice that doesn’t melt, however, that’s a sign you should call for service.