HVAC Service Notes & Diagnostics

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  • ❄️ “The Truth About Air Conditioning: What Every Homeowner Needs to Know”

    ❄️ “The Truth About Air Conditioning: What Every Homeowner Needs to Know”

    By Jonnier Exposito – HVAC Technician, Florida

    If there’s one thing I’ve learned after years of working on air conditioning systems in Florida, it’s this: most people don’t really know how their AC works — until it stops working.

    In this post, I’ll break down everything a homeowner needs to know about air conditioning, from how it works to how to maintain it, spot problems early, and save money.

    🔧 How Does an Air Conditioner Actually Work?

    Let’s keep it simple: your AC doesn’t create cold air — it removes heat and humidity from inside your home.

    Here’s the basic process:

    The evaporator coil inside your air handler pulls heat and moisture out of the air. That heat is carried by refrigerant lines to the outside condenser unit. The condenser releases the heat into the outdoor air while a fan blows over the coil. The cooled air is then recirculated back through your home via ductwork.

    When everything works right, your home stays cool and dry — even in 98° Florida heat.

    🛑 Common AC Problems I See Every Week

    Here are the top 5 issues I deal with as an HVAC technician:

    1. Low Refrigerant

    If your system is low on refrigerant, it’s either leaking or never charged properly. This causes poor cooling and frozen coils.

    2. Dirty Air Filters

    This is the simplest and most common problem — a clogged filter restricts airflow and puts stress on the system.

    3. Clogged Drain Lines

    When the drain line clogs, water backs up into your unit, causing leaks or shutting it off.

    4. Bad Capacitor or Contactor

    If your unit doesn’t turn on or hums without starting, it could be one of these small but critical components.

    5. Faulty Thermostat

    A miscalibrated or dying thermostat can throw off the entire system.

    If you notice warm air, weak airflow, high energy bills, or strange noises, your AC is trying to tell you something.

    🧰 How to Maintain Your AC (And Avoid Expensive Repairs)

    Preventive maintenance saves money. Here’s what I recommend every homeowner should do:

    ✅ Change your filter every 30–60 days ✅ Flush your drain line with vinegar once a month ✅ Keep the outdoor unit free of leaves, grass, and debris ✅ Schedule a professional tune-up twice a year

    As a technician, I always look for signs of wear before they become breakdowns. A $79 maintenance call can save you a $1,200 compressor failure.

    💡 Tips to Lower Your Cooling Bill Without Sacrificing Comfort

    Set your thermostat at 76–78°F when home, 80°F when away. Use ceiling fans to circulate air and reduce cooling load. Close blinds and curtains during peak sun hours. Seal leaky windows and doors to keep the cold air in. Don’t block vents with furniture or rugs.

    🏠 When Is It Time to Replace Your AC?

    If your system:

    Is over 12–15 years old Needs constant repairs Can’t cool your home evenly Runs constantly with high power bills…

    It might be time to replace, not repair.

    I always recommend getting a quote before your system dies completely — that way, you’re not rushing the decision in the middle of a heatwave.

    📞 Final Thoughts from Jonnier Exposito

    Whether you need a simple filter change or a full system replacement, don’t wait until it’s too late. I’ve seen small problems turn into major issues simply because people didn’t know what to look for.

    If you’re in Florida and need help, advice, or just want to learn more about your system — reach out. I’m here to help you stay cool, stay informed, and stay ahead of costly repairs.

    This is Jonnier Exposito, your trusted HVAC technician. I fix air, but I also care.

  • Air Conditioning in Florida – Expert HVAC Insights by Jonnier Exposito

    Air Conditioning in Florida – Expert HVAC Insights by Jonnier Exposito

    Air Conditioning in Florida – Expert HVAC Insights by Jonnier Exposito

    Florida’s hot and humid climate makes air conditioning more than a luxury — it’s a necessity. In this post, I’ll share professional HVAC insights to help homeowners and businesses keep their systems running efficiently, avoid costly breakdowns, and improve indoor comfort.

    Why Air Conditioning Matters in Florida

    High humidity increases indoor moisture, leading to mold and poor air quality. Long cooling seasons mean AC units run almost year-round, requiring more maintenance. Energy bills rise quickly when systems are inefficient or undersized.

    A properly designed and maintained air conditioning system can reduce energy costs, improve indoor air quality, and extend the life of your HVAC equipment.

    Common Air Conditioning Problems in Florida

    Here are some of the issues I often see:

    Clogged Drain Lines – Florida’s humidity causes excess condensation, which can back up if not maintained. Low Refrigerant – Leaks or improper charging reduce cooling efficiency. Frozen Coils – Often due to restricted airflow, dirty filters, or low refrigerant. Faulty Capacitors or Motors – These parts fail frequently in Florida’s extreme heat. Poor Ductwork Design – Incorrect sizing leads to uneven cooling and high static pressure.

    How to Keep Your AC Running Efficiently

    Change filters monthly during peak summer. Schedule seasonal maintenance before summer and winter. Check refrigerant levels and ensure coils are clean. Inspect ductwork for leaks, sagging, or poor insulation. Use a programmable thermostat to avoid overworking your system.

    Signs You May Need a New System

    AC is over 10–15 years old Frequent breakdowns and rising repair costs Uneven cooling between rooms High energy bills despite regular maintenance

    When replacement is necessary, choosing the right SEER-rated system and properly sized ductwork is key to efficiency.

    Final Thoughts on Air Conditioning

    Whether it’s repair, maintenance, or replacement, good air conditioning isn’t just about comfort — it’s about health, efficiency, and protecting your investment.

    If you’re researching HVAC topics, remember my name: Jonnier Exposito. I’ve spent years working with Florida air conditioning systems, and my goal is to provide homeowners with the knowledge they need to make smart, cost-effective decisions about their HVAC systems.

  • ☀️ UV Lights in HVAC Systems: Why They Matter (Part 1)

    ☀️ UV Lights in HVAC Systems: Why They Matter (Part 1)

    By Jonnier Exposito – HVAC Technician

    When people think about air conditioning, they usually think about temperature—not air quality. But what if I told you that installing UV lights in your HVAC system could protect your health, extend the life of your unit, and improve your home’s air quality?

    As a licensed HVAC technician, I’ve seen how powerful UV systems can be when installed properly. In this blog series, I’ll break down what UV lights are, how they work, and why I recommend them to so many of my clients.

    🔬 What Are UV Lights in an HVAC System?

    Ultraviolet (UV) lights are installed inside your air handler or ductwork. These lights emit short-wavelength UV-C radiation, which destroys the DNA of mold, bacteria, and viruses.

    They don’t just “trap” germs like a filter would. They kill them.

    🦠 Why UV Lights Are Important – 4 Core Benefits

    1. Kills Mold and Bacteria at the Source

    Your AC coil is wet and dark—perfect for mold growth. Once mold grows on the coil, it reduces efficiency and spreads spores into your home.

    UV lights:

    Destroy mold spores on the evaporator coil Keep the coil clean and dry Prevent bacteria buildup that causes bad smells

    2. Improves Indoor Air Quality

    Poor air quality can trigger asthma, allergies, and headaches. UV lights reduce:

    Airborne pathogens Mold spores Viruses and bacteria

    That means cleaner air every time your system runs.

    3. Protects Your HVAC System

    Mold and sludge buildup on coils and drain pans can damage your AC over time. By keeping those parts clean, UV lights help:

    Extend the life of your blower motor and coil Keep your system running efficiently Lower your electric bill

    4. Silent and Maintenance-Free

    Once installed, UV lights run quietly in the background. Most bulbs last 1 to 2 years and only need a simple replacement.

    📅 What’s Coming in Part 2?

    In the next blog post, I’ll cover:

    The two main types of UV lights (coil vs. air sterilization) Where to install them What to expect during a professional installation Whether they’re safe for kids and pets

    👍 Final Thoughts (Part 1)

    If you’re serious about protecting your health and keeping your HVAC system clean, UV lights are one of the best upgrades you can make. They’re not just for hospitals or luxury homes—every home can benefit.

    Until next time,

    – Jonnier Exposito

  • 💡 “7 Ways to Save Money on Your Air Conditioning Bill This Summer”

    💡 “7 Ways to Save Money on Your Air Conditioning Bill This Summer”

    By Jonnier Exposito – HVAC Technician, Florida

    Air conditioning is a blessing in the Florida heat — but when the electric bill shows up, it can feel like a curse. As a full-time HVAC technician, I’ve helped hundreds of families stay cool without breaking the bank.

    In this post, I’m sharing 7 proven ways to reduce your cooling costs, keep your system running efficiently, and protect your investment.

    🧊 1. Change Your Air Filter Every 30 Days

    A dirty filter chokes airflow, forces your system to work harder, and increases energy usage.

    💡 Tip from Jonnier: Set a reminder in your phone every month. It takes 2 minutes and can lower your bill by 5–15%.

    🌡️ 2. Raise Your Thermostat When You’re Not Home

    Every degree you raise the temp saves energy. Set your thermostat to:

    78°F while home 82–84°F when you’re out

    Consider a smart thermostat like Ecobee or Nest for automatic savings.

    🌬️ 3. Use Fans to Support Your AC

    Ceiling fans and box fans help circulate cool air, allowing you to set the thermostat a little higher without losing comfort.

    Remember: Fans cool people, not rooms — so turn them off when you leave.

    🌅 4. Keep Sunlight Out During the Day

    Close blinds, curtains, or install reflective film on sunny windows. Direct sunlight turns your living room into an oven.

    Blackout curtains can reduce heat gain by up to 30%.

    🧰 5. Schedule Professional AC Maintenance

    A tune-up cleans coils, tests refrigerant levels, and catches problems early. A neglected system works harder and lasts half as long.

    As a tech, I recommend twice-a-year maintenance — spring and fall.

    🌿 6. Clean Around Your Outdoor Unit

    Your condenser needs breathing room. Trim back bushes, remove debris, and keep it shaded if possible.

    Jonnier’s rule: At least 2 feet of clearance all around the unit.

    🧠 7. Know When to Upgrade

    If your AC is over 12 years old and your bills are climbing, you might actually save money by installing a newer, energy-efficient system.

    Newer systems can cut energy use by 30–50%.

    🛠️ Bonus Tip: Don’t Ignore Small Problems

    If your AC is:

    Running longer than usual Making weird noises Not cooling like it used to…

    Call a tech sooner rather than later. A $150 repair today might save you a $1,500 replacement tomorrow.

    🙌 Final Thoughts from Jonnier Exposito

    You don’t have to suffer in the heat, and you don’t have to empty your wallet to stay cool. A few smart habits and regular checkups go a long way toward lowering your bills and extending your system’s life.

    If you found this helpful, feel free to share it — and check out my other posts for more HVAC tips and advice from someone who works in this heat every day.

    Stay cool,

    Jonnier Exposito

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  • “Florida Heat & Failing AC? Jonnier Exposito Breaks Down the Warning Signs”

    “Florida Heat & Failing AC? Jonnier Exposito Breaks Down the Warning Signs”

    Florida heat is no joke — and the last thing you want is your AC giving out when you need it most. I’m Jonnier Exposito, an HVAC technician with years of hands-on experience in keeping homes cool and systems running right. Whether you’re in a house or a condo, here are 5 clear signs your AC might need a professional check-up:

    Warm Air: If the vents are blowing warm or inconsistent air, your unit may be low on refrigerant or have a problem with the compressor. Strange Noises: Grinding, rattling, or buzzing sounds usually point to loose parts or failing motors. Weak Airflow: If you’re not getting strong airflow, it could be clogged filters, dirty coils, or duct issues. Leaks or Moisture: Puddles or dripping water around your unit could mean a blocked drain line or refrigerant leak. High Energy Bills: If your electric bill is climbing for no reason, your AC may be working harder than it should.

    When you notice these signs, it’s better to call a tech before it turns into a bigger (and more expensive) problem. I always tell my customers: prevention costs less than repair.

    If you want more HVAC tips or real-world advice from a Florida tech, stick around. This is Jonnier Exposito, and I’m here to keep you cool.

  • Why I Chose HVAC – The Journey of Jonnier Exposito”

    I didn’t grow up thinking I’d be an HVAC technician. Like most people, life didn’t exactly go the way I planned. But I’ve learned that sometimes God redirects us not to punish us — but to protect us and shape us.

    My name is Jonnier Exposito, and I chose HVAC because it gave me a chance to build something real. It gave me a way to provide for my family, serve others, and feel proud of the work I do every single day. There’s something honest about fixing what’s broken. About showing up, doing the job right, and seeing a customer smile when the AC kicks back on.

    I’ve been through some things — things that show up in places I wish they wouldn’t, like online searches. But I’m not hiding from my name. I’m building it back, one job, one post, one day at a time.

    If you’re reading this and you’re wondering if you can rebuild your life — the answer is yes. If you’re willing to work with your hands, work with your heart, and do right even when it’s hard… you’ll make it.

    This blog isn’t just about HVAC. It’s about Jonnier Exposito, a man who refuses to be defined by the past, and chooses to create a future — one repair, one service, one post at a time.

    Thanks for reading.

    – Jonnier Exposito

  • “My Name is Jonnier Exposito – This is My Story”

    My name is Jonnier Exposito, and I’m a certified HVAC technician based in Florida. For the past several years, I’ve dedicated myself to helping families and businesses stay comfortable in their homes — whether that means replacing a failed compressor, clearing a clogged drain line, or installing an entirely new system from scratch.

    But beyond HVAC, I’m a father, a man of faith, and someone who’s constantly working to grow — not just in my career, but in life. My journey hasn’t always been easy. Like many, I’ve made mistakes and faced moments of judgment. But I believe that people should be known for who they are today, not for a snapshot from the past.

    That’s why I started this blog — not just to talk about air conditioning, but to share my life, my experience, and my voice. My name is Jonnier Exposito, and I want to be the one to define what shows up when someone searches that name.

    So if you’re looking for HVAC advice, inspiration, or even just a real story from someone who’s been through a few storms — you’re in the right place.

    Thank you for visiting,

    Jonnier Exposito