Why Your Furnace Doesn't Blow Hot Air

Furnace doesn't blow hot air can be caused by several common issues you can quickly check:

1. Thermostat settings issue: Ensure it's set to 'Heat' and the temperature is high enough.
2. Dirty air filter: Replace your filter every 1-3 months to avoid overheating.
3. Pilot light or ignition problems: Check if your pilot light is out or your ignition switch isn't working.
4. Fuel supply issue: Verify your gas line is open or your fuel supply isn't empty.
5. High-limit switch problem: This switch can shut your furnace down if it senses overheating.

When it's chilly outside, and your furnace decides to blow cold air instead of warm comfort, it's more than annoying. It disrupts your home's comfort, increases energy costs, and might signal a deeper issue.

I've prepared this guide to help you quickly identify why your furnace isn't giving you the warmth you're expecting.

My name is Allen Chenault, and I'm the founder of AC's Heating & Air with years of experience diagnosing and resolving heating issues, including why your furnace doesn't blow hot air. I'll walk you through solving your furnace problems step-by-step so you can stay comfortable year-round.

Quick furnace doesn't blow hot air terms:

- Electric heater blowing cold air in house

‍- Electric heater not blowing hot air in house

‍- Heat not blowing out of vents in house

Common Reasons Your Furnace Doesn't Blow Hot Air

Imagine this: you wake up bright and early on one of those surprisingly cold Florida mornings (yes, even in sunny Orlando, Winter Park, or Apopka it can get chilly!), eager to warm up your home. You turn on your furnace, expecting cozy warmth—but instead, you're met with cold air blowing from your vents. Brrr!

As frustrating as it is, you're definitely not alone. At AC's Heating & Air, about 80% of the time we find the cause of a furnace doesn't blow hot air scenario falls into just a handful of common issues. The good news? Many of these issues can be quickly checked and even fixed without immediately calling in the pros.

Let's explore the most common reasons behind a furnace that refuses to give you the heat you're counting on.

Furnace Doesn't Blow Hot Air Due to Thermostat Issues

Over the years, I've helped countless Central Florida families with furnace troubles. And guess what? One of the most common solutions is also the simplest—checking the thermostat. Many homeowners overlook the thermostat, but it's essentially the "brain" of your heating system. If it's confused, your furnace will be too.

Here are a few thermostat-related problems we often run into:

• Incorrect settings: Sometimes, the problem is as simple as ensuring your thermostat is set to "HEAT," not "COOL" or "OFF." It sounds obvious, but we've had plenty of emergency calls resolved with a simple mode switch.
• Fan set to "ON" instead of "AUTO": This means your fan runs all the time—even when your furnace isn't heating—making rooms feel cold between heating cycles.
• Dead batteries: For battery-powered thermostats, low batteries can cause erratic furnace behavior. Check for a battery indicator on your display.
• Improper thermostat location: If it's near a sunny window, drafty hallway, or heat source, it might read the temperature incorrectly and shut off your furnace too soon.
• Loose wiring or calibration problems: Older thermostats can drift out of calibration over time, or wires may loosen after years of use.

One memorable case involved a lovely grandmother from Winter Park, frantically calling us during a cold snap. She was convinced her entire furnace had failed. When we arrived, we found her grandkids had accidentally switched the thermostat mode to "COOL" during playtime. A quick fix, and her house was warm and cozy again in no time!

Furnace Doesn't Blow Hot Air Because of Dirty or Clogged Air Filters

Another surprisingly common reason your furnace doesn't blow hot air is a dirty, clogged air filter. Just like a stuffy nose makes it hard to breathe, a clogged filter makes it tough for your furnace to "breathe" easily.

When your filter gets filled with dust, pet fur, and household debris, airflow through your furnace slows way down. This restricted airflow means less warm air reaches your rooms. Worse, it can cause your furnace to overheat, triggering the high-limit safety switch to shut off the burners. At that point, your furnace fan keeps running, but it's just blowing cold air into your home.

Not only do dirty filters decrease comfort, they also increase energy bills (by forcing your furnace to work harder) and shorten your furnace's lifespan. In fact, according to industry data, clogged air filters can reduce your furnace efficiency by up to 15%. We've even seen customers lower their heating bills by nearly $30 a month after simply changing their filters!

You might wonder how often you should replace your furnace filter:

• Standard 1-inch filters: Replace every 30-60 days
• Pleated filters: Every 90 days
• High-efficiency filters: Every 6-12 months
• If you have pets or allergies: Change them more often—every 30-45 days is usually best.

We helped a customer in Celebration who had heating trouble every single winter. Turns out they'd been using the same furnace filter for over a year! Once they started regularly changing filters, their heating problems vanished.

Pilot Light or Ignition Problems

If you've checked your thermostat and air filter but still find your furnace doesn't blow hot air, it's time to inspect your ignition system. Older furnaces (pre-1990) usually have a standing pilot light. Newer models have electronic ignition systems instead.

For pilot lights: Check through your furnace's viewing window—if there's no little flame burning, your pilot light may have gone out. Common reasons include drafts, clogged pilot openings, or a faulty thermocouple. Usually, instructions for safely relighting your pilot are printed right on your furnace.

For electronic ignitions: These modern systems use either a hot surface ignitor (which glows red-hot) or an intermittent pilot ignition. Both systems can wear out over time or experience issues like cracked ignitors, dirty flame sensors, or control board glitches.

Sometimes, ignition isn't the issue—it could be your gas supply. Make sure your gas valve is fully open and verify other gas appliances (like your stove) are still working. If they're not, you might have a gas line blockage or pressure problem.

One chilly winter morning, we received an urgent call from a family in Orlando whose furnace was blowing cold air, despite the thermostat being set to a comfortable 78°F. Upon inspection, we found their furnace's flame sensor was coated in carbon deposits, causing the burners to shut off prematurely. After quickly cleaning it, their furnace was back in action, providing cozy warmth throughout their home.

Important Safety Note: Anytime you smell gas (like rotten eggs), don't hesitate. Immediately leave your home without flipping switches or creating sparks, call your gas company from a safe location, and don't return until professionals confirm it's safe.

Thankfully, many of these common furnace problems are easy fixes. However, if you're unsure or uncomfortable troubleshooting your heating system, don't hesitate to reach out to us at AC's Heating & Air. We're always happy to lend a helping hand, keep your family comfortable—and help you avoid those chilly morning surprises!

Furnace Needs Time to Warm Up

Imagine this: it's a chilly morning, you switch on your furnace, and then—nothing but cold air. Before panic sets in and you assume your furnace doesnt blow hot air, take a deep breath and relax. There's a good chance your furnace simply needs a few minutes to warm up.

This warm-up period is completely normal, especially if your furnace has been resting for a while. Just like you need a moment to gather your energy on a cold morning, your furnace also needs a little warm-up time to get going.

So, what's really happening during these initial moments?

When you first turn your furnace on, it's busy behind the scenes. It ignites burners, warms the heat exchanger, and waits for the right temperature before kicking on the blower fan and sending cozy warmth throughout your home. This usually takes about 3-5 minutes—but can vary slightly depending on the type of furnace you own.

Don't worry if you notice some cool air at first—this happens because your ducts hold room-temperature air that's pushed out before the heated air arrives. This cold breeze can feel particularly uncomfortable on chilly winter mornings, but it won't last.

Within just a few minutes, you'll start feeling the air gradually warming up. Soon enough, your home will feel cozy again.

One of our customers in Winter Garden once called us, convinced their newly-installed furnace was faulty because it took a few minutes before feeling warm. After explaining this normal process, we encouraged them to wait about five minutes before reaching any conclusions. Sure enough, their furnace kicked in as expected, and they're now happily enjoying warm air without worry.

When should you be concerned? If your furnace is still blowing cold air after more than 5-7 minutes, then there might actually be an issue. Similarly, if your system keeps alternating between blowing hot and cold air repeatedly, that's also a sign that something might need attention. If that's the case, you can always check our guide on heat not blowing out of vents in house or reach out to our professionals at AC's Heating & Air.

Remember—patience is key. Give your furnace a few minutes, and chances are you'll be comfortably warm again in no time!

High Limit Switch Failure and Overheating

If your furnace doesn't blow hot air, one sneaky culprit you might not know about is something called a high-limit switch. It sounds fancy, but it's really just a safety device inside your furnace designed to protect your system from overheating. Think of it as your furnace's personal bodyguard—it steps in whenever things get too hot.

When your furnace runs normally, the high-limit switch keeps an eye on the internal temperature. As soon as the heat exchanger warms up enough, the switch signals the blower fan to kick on and send warm air throughout your home. However, if the furnace temperature climbs too high, the switch intervenes by shutting off the burners to prevent damage. The blower fan will usually keep running to cool everything down, which is why you suddenly feel cool air coming from your vents.

Signs of High Limit Switch Issues

Wondering if this switch is causing your heating headaches? Here are some tell-tale signs:

You might notice that your furnace initially starts heating properly, but quickly switches to blowing cold air. Sometimes, your system may shut itself off completely before reaching the temperature you've set on your thermostat. Another symptom is frequent on-off cycling ("short cycling"), where the furnace repeatedly starts up and then shuts down after just a few minutes. And occasionally, the blower fan might keep running even after the burners shut off.

Any of these signs could mean your high-limit switch is being triggered due to overheating—or it might even indicate the switch itself is failing.

Common Causes of Overheating

Overheating usually happens when your furnace can't move enough air. The biggest offender, as we've mentioned before, is a clogged or dirty air filter. When air can't flow smoothly, heat builds up quickly inside your furnace, causing the high-limit switch to turn off the burners.

Other airflow problems include blocked or closed air vents. If your home's return air vents or heat registers are blocked by furniture, rugs, or dust buildup, airflow is restricted, leading to overheating. The same issue happens with undersized or improperly installed ductwork—your furnace simply can't "breathe" well enough.

Sometimes, the blower itself is the problem. A worn-out or faulty blower motor won't circulate air effectively, allowing heat to build up. Also, frequent short cycling caused by other system issues can make overheating worse, leading to repeated high-limit switch triggers.

A Real-World Example

Last winter, we got a panicked call from a family in Isleworth who were dealing with a frustrating problem: the furnace would warm their home for about 10 minutes, then suddenly switch to blowing chilly air. When we arrived, it didn’t take long to spot the issue. Turns out their recent redecorating spree led to some furniture and rugs being placed over several floor vents—blocking airflow and causing the furnace to overheat. After simply rearranging the room to clear those vents, the furnace started working normally again. The family was relieved, warm, and even got a bonus room makeover in the process!

When Professional Help is Needed

While you can check and fix easy airflow problems yourself—like swapping out a dirty filter or ensuring your vents are clear—some overheating issues need professional attention. If the high-limit switch itself is faulty, it must be replaced by a certified HVAC technician. The switch connects to your furnace's electrical system, so it's not something you should handle without training and the right tools.

Other issues, such as problems with the blower motor, wiring, or furnace control board, are also best left to professional HVAC specialists like our team at AC's Heating & Air. These parts are often complex and require specialized knowledge and tools to properly diagnose and repair.

Please don't ignore a furnace that's frequently overheating. Not only does it cause discomfort and higher energy bills, but it could also damage your furnace—or worse, create a fire hazard. If your furnace repeatedly switches to cold air or you suspect overheating issues, call our team right away for a professional diagnosis. We'll safely troubleshoot and resolve the issue, bringing back the cozy warmth your home deserves.

Leaky or Blocked Ductwork

Another sneaky reason your furnace doesn't blow hot air as effectively as you'd like could be hiding in your ductwork. Even if your furnace is pumping out warm air just fine, problems with your home's air ducts can mean that comfort never reaches you.

The Impact of Leaky Ducts

Did you know that according to HVAC industry studies, leaky ducts can waste up to 30% of the warm air your furnace produces? That's like baking a delicious pie and leaving your kitchen window wide open—your hard-earned heat escapes into spaces like your attic, crawlspace, or even inside your walls.

Leaky ducts don't just waste energy—they also create pressure imbalances. These imbalances can pull cold outdoor air into your home through tiny cracks and gaps. That's why you might notice certain rooms feel colder than others or experience drafts that you can't quite pinpoint.

This uneven heating not only makes your home uncomfortable, it also causes your furnace to run longer and work harder to maintain your thermostat setting. Longer run times mean higher energy bills and extra wear and tear on your heating system.

Signs of Ductwork Problems

Wondering whether your ducts might be the reason your furnace doesn't blow hot air the way it should? Look out for some of these common clues.

If certain rooms in your home always feel colder than others despite your furnace running continuously, you might have leaks or blockages in your ducts. Higher energy bills that don't match your conservative thermostat settings are another clear warning sign.

You might also notice unusual amounts of dust gathering around your air vents or extra dust throughout your home. That's because leaky ducts can draw in attic dust and debris and circulate it inside your living spaces. Strange noises—like whistling or rushing sounds—coming from your vents or walls could also mean air is escaping through gaps or holes.

Take a quick peek in your attic or crawlspace. If you see flexible ductwork that's crushed, twisted, kinked, or even disconnected, you've found a likely culprit.

Common Ductwork Issues We Find in Central Florida Homes

In our experience helping homeowners throughout Orlando, Apopka, Winter Park, and Winter Garden, we've frequently encountered several common ductwork issues.

Duct connections can come apart over time, especially in hot attics where sealing materials dry up and fail. Improper installation is another big one—often ducts are the wrong size or have too many bends, making it harder for airflow to reach rooms evenly.

Florida homes often suffer from inadequate insulation around ductwork, especially in attics. This can cause significant energy loss due to the dramatic temperature swings we experience here.

We've even found cases where animals—like squirrels or rats—have chewed through ductwork, creating holes and leaks that let your precious heated air escape.

Finally, don't forget those blocked registers. Furniture, rugs, curtains, or household clutter can unintentionally block airflow at floor and wall vents, reducing your system's effectiveness.

Real-World Example

Last winter, we received a call from a frustrated family in Winter Park. Their master bedroom was unbearably cold, even though the rest of the house felt cozy and their furnace ran almost constantly. After crawling into their attic to investigate, we found a large tear (about six inches!) in the main duct feeding that room. Nearly all their heated air was escaping into the attic instead of warming their bedroom.

One quick repair later, their bedroom was warm and comfortable for the first time in weeks. Even better, they immediately noticed their furnace didn't have to work as hard, leading to lower monthly energy bills.

DIY Duct Inspection Tips

While professional duct testing and sealing are always going to be the most thorough solutions, there are a few simple checks you can do yourself if you suspect duct issues:

• Check exposed ductwork: Take a look at visible ducts in your attic, basement, or crawlspace and inspect connections for gaps, tears, or obvious damage.
• Feel airflow at registers: Hold a piece of tissue paper up to each vent. It should flutter gently and consistently. Weak or inconsistent airflow is a red flag.
• Notice temperature variations: Use a thermometer to measure different rooms. Temperature differences of more than 3 to 5 degrees can indicate ducts aren't delivering heat evenly.
• Make sure vents are open and clear: Double-check that nothing is blocking your vents—move furniture, rugs, or drapes away from registers to improve airflow instantly.

If you find or suspect ductwork problems causing your furnace not to blow hot air effectively, don't hesitate to contact our team at AC's Heating & Air. We offer professional duct inspection and sealing services to help you stay warm, save money, and keep your furnace running smoothly.

When to Call a Professional

While it's satisfying to troubleshoot your furnace on your own (and hey, who doesn't feel like a hero fixing something around the house?), there are times when calling a professional isn't just wise—it's essential. Knowing when to hand things over to the pros can save you from bigger headaches and keep your home and family safe.

Safety-Critical Issues Requiring Immediate Professional Attention

Safety should always come first when dealing with your furnace. If you notice any of the following, it's time to step away and call for help immediately:

If you smell gas—that rotten egg odor—don't stick around to investigate. Leave your home right away and call your gas company from somewhere safe. Never risk your safety by trying to fix a gas leak yourself.

A brief, dusty burning smell when turning your furnace on at the start of the season is normal. But if a burning odor persists, it could be serious—possibly due to overheating components or wiring issues. Shut your furnace off and get a technician to inspect it promptly.

Any electrical issues like buzzing or sparking from your furnace are definite red flags. Electricity and gas aren't something you want to tinker with unless you're trained and certified.

Likewise, if your carbon monoxide detector starts beeping or you start experiencing headaches, dizziness, or nausea while your furnace is running, shut off the system, leave the house immediately, and call for emergency service. These symptoms might indicate dangerous gas leaks from problems like a cracked heat exchanger.

Also, keep an eye on your pilot flame. If the flame is yellow rather than blue, that's a sign of incomplete combustion, which can produce harmful carbon monoxide. Have a professional take a look right away.

Complex Technical Issues Best Left to Professionals

Some furnace issues require specialized knowledge and equipment, making them tricky or even unsafe for homeowners to tackle. For example, problems involving your furnace’s circuit board (the furnace’s "brain") need expert attention. Misdiagnosing or mishandling these components can lead to bigger, costlier problems down the road.

A cracked heat exchanger is another issue requiring immediate professional intervention. This can leak dangerous gases into your living space, and only a trained technician can safely identify and replace the component.

Issues with your furnace's blower motor, responsible for circulating air through your home, can also be quite challenging. Diagnosing and repairing motor troubles requires special tools and experience.

Additionally, malfunctions involving the gas valve—a critical component regulating gas flow to your burners—must be addressed by certified HVAC professionals. Improper handling of gas valves can pose serious safety risks.

Finally, if your furnace is working intermittently, turning on and off unpredictably, diagnosing the root cause can be tricky even for seasoned DIY-ers. Professional technicians have the knowledge and specialized testing equipment to pinpoint and solve these elusive problems quickly.

Benefits of Professional Maintenance

Regular furnace checkups by a professional aren't just another home maintenance chore—they're an investment in your comfort and safety. During a thorough maintenance appointment, our trained technicians at AC's Heating & Air will inspect and clean crucial components, test safety controls, check all electrical connections, calibrate your thermostat, and lubricate moving parts.

We also take a careful look at your ductwork for any leaks or blockages, test combustion efficiency, and measure carbon monoxide levels to ensure your system is safe to operate. And yes, we'll even replace your filters and clean the system thoroughly while we're at it!

According to industry data, regular professional maintenance can extend your furnace’s lifespan by as much as 30%. It also significantly reduces the likelihood of unexpected breakdowns (and chilly mornings!) when you least want them.

What to Expect When You Call AC's Heating & Air

At AC's Heating & Air, we understand how frustrating it can be when your furnace doesn't blow hot air—especially during those occasional cold snaps here in Central Florida. When you reach out to us, we promise you'll always get a prompt response. We know heating issues can't wait.

Our NATE-certified technicians are experienced professionals who take pride in their work. Using advanced diagnostic tools, they'll thoroughly inspect your furnace to pinpoint exactly what's causing the issue. We'll explain our findings to you clearly—no confusing jargon—and present all your options along with upfront pricing, so there are no surprises.

We use only high-quality parts and stand confidently behind our repairs. Before we leave, we'll also share practical advice to help you prevent similar furnace troubles in the future.

One of our Orlando customers had been struggling with intermittent heating issues for weeks, making it tough to stay comfortable. Another company missed the real problem, but our technician quickly identified a faulty pressure switch that only specialized testing equipment could detect. Within minutes, their furnace was running smoothly again.

Attempting complicated furnace repairs without proper training can void your warranty, cause additional damage, or even create dangerous situations. Professional HVAC repair isn't just about correcting the current issue—it's about making sure your heating system stays safe and efficient for years to come.

If your furnace has you scratching your head (or bundling up!), don't hesitate to get in touch with AC’s Heating & Air. We’re here, ready, and happy to help.

Frequently Asked Questions about Furnace Not Blowing Hot Air

Why is my furnace running but not blowing hot air?

Ah, the dreaded moment—your furnace kicks on, but instead of warm comfort, you feel cold air from the vents. Don't panic yet! Several common issues cause a furnace doesn't blow hot air scenario.

First, double-check your thermostat settings. Make sure it's set to "HEAT," not "COOL," and verify the desired temperature is higher than the current room temperature. Also, confirm the fan switch says "AUTO," because if it's set to "ON," your fan runs constantly—even when the furnace isn't heating—making you feel chilly.

Give your furnace a few minutes to warm up. Most furnaces need about 3-5 minutes to fully heat up the heat exchanger. Initially, you'll feel room-temperature air pushed through your ducts, which might seem cold. Wait a bit before troubleshooting further.

Another common culprit is a dirty air filter. Dirty filters restrict airflow, causing your furnace to overheat and trigger safety features that shut off your burners. The fan continues blowing air to cool down the system, creating chilly drafts.

Ignition or pilot light issues can also cause your furnace to blow cold air. Check if your pilot light is out (in older systems) or if your electronic ignition isn't lighting the burners.

Lastly, verify your fuel supply. Whether you have natural gas, propane, or oil, make sure your supply isn't interrupted or valves haven't been accidentally closed.

In our experience serving homes throughout Orlando, Apopka, and Winter Garden, about 70% of "furnace running but no heat" calls are quickly resolved by checking thermostat settings, dirty filters, or allowing sufficient warm-up time.

Can a dirty air filter cause my furnace to blow cold air?

Absolutely! A dirty or clogged air filter is one of the most common reasons your furnace doesn't blow hot air.

Think of your furnace filter like your home's breathing mask. When it's fresh and clean, your furnace breathes easily. But when the filter gets clogged with dust, pet hair, and dirt, it starves your furnace of proper airflow. This restricted airflow can cause heat to build up inside the furnace, triggering the safety feature called a high-limit switch. This switch shuts off the burners to prevent overheating, even though the fan keeps running to cool things down. That results in cold air blowing through your house.

We had a customer in Celebration last winter whose furnace blew warm air for just a few minutes before switching to cold. Turns out their furnace filter hadn't been replaced in six months! After swapping the old filter for a new one, their furnace immediately began working as it should—consistently warm air and much happier homeowners.

How often should I replace my furnace filter?

Replacing your furnace filter is one of the simplest and most effective ways to keep your furnace running smoothly. But how often? It depends on several factors, including the type of filter and your household conditions. Here's a handy guide:

Standard 1-inch fiberglass - Every 30 days.

Pets, allergies, high occupancy Pleated filters (1-2 inch) - Every 60-90 days

Construction, dusty conditions High-efficiency pleated (4-5 inch) - Every 6-12 months

Running system continuously Washable/reusable - Clean every 30 days. Follow manufacturer instructions

You might need to change it more often if you notice signs like visible dirt accumulation (hold your filter up to a light—if you can't see through, it's time to switch!), increased dust around your home, longer furnace run times, or higher energy bills.

Pro tip: Write the date right on your filter when installing it—or set a reminder on your phone—so you never forget this simple maintenance step that can save you headaches down the road.

How can I tell if my pilot light is out?

If you have an older furnace with a standing pilot light, here's how you can safely check if it's still lit:

Locate the access panel on your furnace (usually near the bottom), and carefully remove it by sliding or unscrewing it. Look for the pilot assembly—a small metal tube typically located near the gas valve—and see if you spot a small blue flame. No flame? Then your pilot's out.

If you have a modern furnace, it probably uses an electronic ignition system rather than a standing pilot. In these systems, no flame will continuously burn; instead, it'll ignite whenever the furnace runs.

Why does my furnace blow cold air when it first starts?

This actually happens to every furnace and isn't usually cause for concern. When your furnace first kicks on, the blower starts circulating air before the furnace has fully warmed up. This means the first air you feel is typically the room-temperature air that's been sitting in your ductwork. Within 3-5 minutes, the air should gradually warm up as your furnace fully heats. If the air stays cold after those initial minutes, then it's worth further investigation.

How do I know if my high limit switch is bad?

The high limit switch is an important safety feature in your furnace. It shuts off your burners if it detects overheating, while allowing the blower to keep running and cool things down.

If your high limit switch is malfunctioning, you might notice your furnace shutting down before it reaches your set temperature. You may also notice the blower running endlessly after the burners shut off, or your furnace cycling frequently between hot and cold air. In some cases, it may prevent your furnace from turning on at all.

Diagnosing and repairing a high limit switch requires specialized tools and electrical knowledge. Because of this, we recommend calling a professional HVAC technician to safely check and repair this component.

Still have questions or need professional help? Our team at AC's Heating & Air proudly serves communities across Central Florida—including Orlando, Winter Park, Apopka, and Winter Garden—with prompt, friendly, and professional furnace repair services. We're always here to help you stay cozy and warm!

More info about Furnace Repair services

Conclusion

We've covered a lot of ground together, exploring all the common reasons why your furnace doesn't blow hot air and how to get it back to delivering toasty warmth during those chilly Central Florida days. From simple homeowner fixes—like adjusting thermostat settings or swapping out dirty air filters—to more complex issues such as pilot light troubles, high-limit switch failures, or leaky ductwork, understanding what's behind your heating woes makes all the difference.

It's great when furnace problems turn out to have quick and easy solutions. (Who doesn't love finding that the thermostat was accidentally set to "COOL"? Happens to the best of us!) But sometimes, what's going on behind the scenes isn't quite so simple. When you encounter issues like electrical malfunctions, ignition system failures, or cracked heat exchangers, calling in a professional isn't just a good idea—it's the safest choice to protect your home and your family's comfort.

At AC's Heating & Air, we've spent years helping folks in Apopka, Winter Park, Orlando, Winter Garden, Celebration, Isleworth, and surrounding communities stay comfortable year-round. Our NATE-certified technicians have seen just about every furnace issue imaginable, and they're ready with the expertise and tools needed to get your heat flowing again. Whether it's a minor repair or a complete furnace replacement, we'll guide you through every step with clarity, warmth, and upfront pricing.

The easiest way to avoid furnace issues is to prevent them in the first place. Our comprehensive HVAC maintenance plans include careful inspections, thorough cleanings, and detailed tune-ups. Regular maintenance isn't just about avoiding breakdowns; it helps your furnace run more efficiently, saves you money on energy bills, and extends the life of your heating system.

For more general background on how furnaces operate, check out the Wikipedia article on Furnaces.

If your furnace isn't blowing hot air, don't spend another day shivering in frustration. Contact AC's Heating & Air today to book a service appointment and get your home feeling cozy again. We're always here to help keep the chill where it belongs—outside your door.

Stay warm, Central Florida!