Heating Service & Furnace Repair in Hernando, Pasco & Citrus Counties
Reliable Heating Services in Hernando County - Stay Warm with Cool Air M.D.
Stay warm and comfortable year-round with Cool Air M.D.—your trusted local provider for heating repair, HVAC repair near me, and seasonal air conditioning service. Whether your AC unit needs attention during winter prep or you’re facing heating issues, we bring fast, honest solutions with no shortcuts.
Even though Florida winters are mild, a reliable heating system still matters. Cool nights can leave your home uncomfortable if your unit isn’t working the way it should. At Cool Air M.D., we provide dependable heating service, furnace repair, and heat pump maintenance across Hernando, Pasco, and Citrus Counties.
Whether you need a quick repair, a new heating system, or seasonal maintenance, our licensed technicians deliver honest, expert service that keeps your family comfortable.
352-251-7000
727-378-3333
Heat Pumps : What You Need to Know
When your thermostat is set to cool, the outdoor condenser unit removes heat from inside your home. You can actually feel this process happening by placing your hand over the top of the outdoor fan — the air coming out will feel warm, because it’s carrying the heat pulled from indoors.
When you switch your system to heat, the process reverses. The reversing valve changes the flow of refrigerant so your unit pulls cold air out of your home while delivering warm air inside. If you stand over the outdoor fan while the heat is running, the air blowing out will feel cool instead of warm — proof that your system is working as designed.

Heating Services We Offer
Heating Repair
If your heater won’t turn on, blows cool air, or makes unusual noises, we can help. Our technicians diagnose the problem quickly and provide reliable furnace repair or heat pump repair for all makes and models.
Heating Installation & Replacement
Sometimes repair isn’t enough. When it’s time for a new system, we install efficient Tempstar heating equipment designed for Florida homes. As an Elite Tempstar Dealer, we’ll size your system correctly and back it with strong warranties.
Seasonal Heating Maintenance
Routine tune-ups extend the life of your system and prevent costly repairs. Our heating maintenance service includes:
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Checking burners, heat exchangers, and safety controls
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Cleaning components for efficiency and safety
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Testing thermostat accuracy
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Inspecting electrical connections
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Ensuring proper airflow
HEATING FAQs:
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❓ What Does Auxiliary (AUX) Heat Mean?
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Auxiliary heat is your system’s backup heating source. When your thermostat is set more than 2° above the current room temperature, or when your heat pump goes into a defrost cycle, the electric strip heaters inside the air handler turn on to help your home reach the set temperature. It’s a normal part of how heat pumps work in cooler weather.
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❓ Why Does My Heat Pump Make a Loud Noise Sometimes?
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If you hear a sudden loud noise in the early morning or evening, it’s most likely your heat pump going into defrost mode. During this cycle, the outdoor fan shuts off while the compressor continues running to warm up the refrigerant and melt any frost on the coils. Since the fan isn’t running, the compressor sounds louder than usual — but it’s normal and nothing to worry about.
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❓ How Often Should My Heating System Be Serviced?
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Your heating system should be checked at least once per year.
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If you missed a spring or summer tune-up, schedule it in the fall or winter.
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If you’ve recently had construction done or suspect mold issues, have the heating coils inspected before turning it on.
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Homes that are kept warmer than 74°F regularly put extra stress on heating components, so those systems may benefit from more frequent maintenance.
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Routine service helps prevent breakdowns and keeps your system efficient.
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❓ Why Do I Smell Burning When I First Turn On the Heat?
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A burning smell the first time you switch on your heater is usually just dust burning off the auxiliary heat kit after months of cooling season. This should only last 5–10 minutes.
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If the smell lingers longer, or you notice smoke, call Cool Air M.D. immediately for an emergency checkup.
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❄️ Bonus Tip: TXV Valves
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A clogged TXV (thermostatic expansion valve) can choke your system’s efficiency. This valve regulates refrigerant flow, and when it fails, it can cause poor cooling and heating performance. Regular maintenance helps catch these issues early before they become expensive repairs.

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If your heating system isn’t keeping up, don’t wait—contact Cool Air M.D. today for reliable HVAC repair near me and expert AC service near me that keeps your family comfortable.
How Can Heating Replacement Services Help Lower Your Energy Bills?
If your heating system has been working overtime for a decade or more, it’s likely running less efficiently than when it was new. Older heaters tend to lose efficiency due to worn components, dust buildup, and outdated technology—which means they draw more power to keep your home comfortable. Upgrading to a modern, energy-efficient system, such as those rated by ENERGY STAR®, can make a noticeable difference in your monthly bills.
Newer heating systems are designed with advanced features like variable-speed motors and improved heat exchangers, which waste less energy and maintain ideal indoor temperatures more consistently. Plus, many modern systems come with programmable thermostats and smart controls for precision, so your heater isn’t working harder than necessary.
If you’re regularly adjusting the thermostat or find your electric bill creeping up every winter, a replacement could pay off in comfort and savings. And as always, regular maintenance ensures your new system continues to perform at its best year after year.
When it’s time to install or replace your heating system, there’s a series of steps we take to ensure everything goes off without a hitch—and that you get reliable warmth through the chilliest Brooksville winters.
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Proper Sizing and Selection
First, we’ll carefully measure up your home to ensure the new unit matches your heating needs. Installing a correctly sized system means you’ll enjoy consistent temperatures throughout your living space—no more hot and cold spots. -
Safe Removal of the Old System
We handle the safe removal of your existing heater with care—no rogue scratches or mystery dings left behind. We follow all safety and recycling guidelines to responsibly dispose of the old unit. -
Professional Installation
Your new heating system is installed with attention to detail—think secure connections, airtight ductwork, and double-checked electrical hookups. We take every precaution to protect your home during the process. -
System Testing and Basic Training
Before we call it a day, we’ll walk you through how your new heating system operates and answer any questions you have. You’ll know how to adjust settings, set the thermostat, and recognize when it’s performing at its best.
So by the time we pack up, you’ll be ready to tackle the winter months with confidence—knowing your heat is good to go.
What Happens After Your New Heating Unit Is Installed?
We don’t just install your new heating unit and dash off into the sunset. Once installation is complete, we’ll walk you through how your new system works—covering everything from setting your thermostat for those chilly Brooksville nights to basic maintenance tips to keep things running smoothly.
If you have questions about strange noises, blinking lights, or even just programming your thermostat, we’ll stick around to answer them all. And don’t worry about your old system cluttering up the yard—we’ll remove and safely dispose of it, so you can focus on enjoying your updated comfort.
Our goal is to leave you confident and prepared for whatever winter (or that wild Florida “cold front”) brings your way.