Is Your AC Ready for Summer? 10 Signs It Needs a Tune-Up

Don’t Sweat It – Get Your AC Ready for the Heat!

Summer is just around the corner, and the last thing you want is your AC breaking down on the hottest day of the year. Regular HVAC maintenance is essential to keep your system running efficiently and avoid unexpected breakdowns. Whether you need HVAC installation, HVAC repair, or  mobile home HVAC solutions, knowing when your AC needs a tune-up can save you time and money.


10 Signs Your AC Needs a Tune-Up


1. Weak Airflow

  • If your AC isn’t blowing strong, it could be a clogged filter or duct issue.
  • Poor airflow can lead to inefficient heating and cooling performance.


2. Warm Air Instead of Cold

  • If your AC is blowing warm air, check your thermostat settings.
  • A refrigerant leak or compressor issue may need HVAC repair.


3. Strange Noises

  • Banging, rattling, or squealing noises are signs of worn-out components.
  • A professional inspection can prevent costly damage.


4. Unpleasant Odors

  • Musty smells could mean mold or mildew in your system.
  • A burning smell might indicate an electrical issue that needs immediate attention.


5. High Energy Bills

  • A sudden spike in your energy bill could mean your AC is working harder than it should.
  • HVAC maintenance can improve efficiency and lower costs.


6. Frequent Cycling

  • If your AC turns on and off too often, it might be struggling to maintain temperature.
  • This could be a sign of a faulty thermostat or an aging system.


7. Excess Humidity Indoors

  • Your AC should help control humidity levels.
  • If your home feels sticky or damp, it’s time for a check-up.


8. Water Leaks Around Your Unit

  • Pooled water or leaks around your AC can indicate a clogged drain line or refrigerant issue.
  • Addressing leaks early can prevent bigger problems.


9. AC Won’t Turn On

  • If your system doesn’t start, check the thermostat and circuit breaker.
  • If everything seems fine, call a professional for HVAC repair.


10. Your AC Is Over 10 Years Old

  • Older units are less efficient and more prone to breakdowns.
  • Upgrading to a new HVAC installation can save on energy costs and improve comfort.


Schedule Your AC Tune-Up Today!

Routine HVAC maintenance keeps your system running smoothly, reduces energy bills, and prevents costly repairs. If you’ve noticed any of these signs, don’t wait until it’s too late!


Call ARCO Heating & Cooling today at (636) 389-6471 for expert HVAC installation, repair, and maintenance in St. Charles, MO.

A woman is sitting on a couch in a living room holding a HVAC remote control.
By ARCO HEATING AND COOLING April 25, 2025
How Seasonal Shifts Impact the Air You Breathe When spring turns into summer or fall shifts into winter, your home’s indoor air quality (IAQ) can change dramatically. These transitional seasons bring fluctuating temperatures, increased allergens, and different HVAC usage patterns—all of which can affect the health and comfort of your indoor environment. At Arco Heating & Cooling , we’re here to help you understand these shifts and keep your home’s air clean and comfortable year-round. What Happens to Indoor Air Quality in Transitional Seasons? More Time Indoors, More Exposure As temperatures become unpredictable, people tend to spend more time inside. While this keeps you comfortable, it also means you’re breathing indoor air more frequently—and if that air is filled with dust, pollen, or other irritants, it can take a toll on your health. Allergens Are on the Move Spring and fall are peak seasons for pollen, mold spores, and other allergens. Without proper filtration and ventilation, these particles can easily find their way indoors and linger in your HVAC system. HVAC Systems Kick Into Gear Transitional seasons often involve switching between heating and cooling. This inconsistent use of your HVAC system can lead to dust buildup in filters and ducts, impacting air quality and system efficiency. Signs of Poor Indoor Air Quality Persistent allergy symptoms Dust buildup near vents Musty or stale indoor smells Dry skin or throat irritation Excess humidity or dryness If you're experiencing any of these, it may be time to improve your indoor air quality. Arco Heating & Cooling’s Indoor Air Quality Solutions Tailored to Missouri and Illinois Homes We offer a range of products and services designed to enhance IAQ throughout transitional seasons: Air purifiers : Capture and remove airborne particles including pollen, dust, and bacteria. Humidifiers and dehumidifiers : Balance humidity levels to prevent mold growth and dry air discomfort. HEPA filters : High-efficiency filters for cleaner, healthier air. Duct cleaning services : Eliminate built-up dust, mold, and debris in your ductwork. Smart HVAC controls : Automate air quality monitoring and adjustments for convenience and efficiency. Our expert team will assess your needs and recommend the right solution to improve your indoor air all year long. Breathe Better This Season—and Every Season Your home should be a safe, comfortable place, no matter the weather outside. By investing in indoor air quality solutions, you protect your health, enhance comfort, and improve HVAC efficiency. Let Arco Heating & Cooling help you transition smoothly into every new season. As a trusted heating and cooling contractor based in St. Charles, MO , we proudly serve the entire St. Louis metropolitan area, including both Missouri and Illinois. Call ARCO Heating & Cooling today at (636) 389-6471 to schedule your indoor air quality consultation. Breathe easier with expert solutions tailored to your home.
A white air conditioner is hanging on a wall next to a window.
By ARCO HEATING AND COOLING April 25, 2025
Find the Perfect HVAC Fit for Your Home's Comfort and Efficiency Selecting the right HVAC system isn’t just about brand or features—it’s about choosing a unit that fits your home’s size and layout. An improperly sized system can lead to high energy bills, uneven temperatures, and unnecessary wear and tear. At Arco Heating & Cooling , we help you choose the perfect system for optimal performance and year-round comfort. Why HVAC System Size Matters An HVAC system that’s too large or too small can cause a variety of issues: Oversized systems short-cycle, leading to inefficient operation and uneven temperature control. Undersized systems run constantly, struggle to maintain comfort, and lead to higher energy usage and faster wear. Correct sizing ensures maximum efficiency, lower utility bills, and a longer-lasting system. Key Factors in HVAC Sizing 1. Square Footage of Your Home The size of your home is the most critical factor. HVAC systems are rated in BTUs (British Thermal Units), and each square foot of living space typically requires a certain number of BTUs. 2. Climate Zone Homes in colder or hotter climates require more powerful systems to maintain comfort. Missouri’s four-season weather means your HVAC system needs to handle both heating and cooling efficiently. 3. Home Layout and Insulation High ceilings, window placement, and insulation quality can impact your home’s heating and cooling needs. A well-insulated home may require a smaller unit than a drafty one. 4. Number of Occupants and Appliances More people and heat-generating appliances (like ovens) can affect your home's internal temperature and should be factored into system sizing. Let Arco Heating & Cooling Help Choosing the right HVAC system doesn't have to be a guessing game. Arco Heating & Cooling offers expert consultation services to: Evaluate your home’s size, layout, and needs. Recommend HVAC systems based on BTU requirements and efficiency ratings. Provide professional installation and ongoing maintenance for peak performance. Get the Right System, the First Time Don’t risk investing in the wrong HVAC setup. Let the experts at Arco Heating & Cooling guide you toward a system that fits your home, budget, and comfort goals perfectly. As a trusted heating and cooling contractor based in St. Charles, MO , we proudly serve the entire St. Louis metropolitan area , including both Missouri and Illinois. Call ARCO Heating & Cooling today at (636) 389-6471 to schedule your HVAC consultation and make the smart choice for your home!
A man is working on an air conditioner and pointing at the wires.
By Arco Heating and Cooling March 4, 2025
Keep Your Heating and Cooling System Running Smoothly Year-Round
Two men are working on a furnace in a basement.
By Arco Heating and Cooling March 4, 2025
Keep Your Home Warm & Cozy Without Unexpected HVAC Breakdowns 
A man is working on an air conditioner with a hose.
By Arco Heating and Cooling March 4, 2025
Stay Warm & Safe with These Essential Furnace Safety Tips 
It shows the amount of co2 in the air.
By Arco Heating and Cooling March 4, 2025
Protect Your Home & Family from the Dangers of Carbon Monoxide 
A man wearing red gloves is working on a boiler.
By Arco Heating and Cooling March 4, 2025
Save Money & Stay Warm with the Best Heating Options 
Two men are shaking hands in front of a house.
By Arco Heating and Cooling March 4, 2025
Protect Your Heating & Cooling System Before Cold Weather Hits 
A red , white and blue van is parked in front of a building.
By Arco Heating and Cooling March 4, 2025
Keep Your Mobile Home Warm & Comfortable This Winter 
A man is kneeling down to fix a furnace in a basement.
By Arco Heating and Cooling March 4, 2025
Ensure Your Heating System Is Ready Before Winter Arrives
Show More