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Spring HVAC Checklist: How to Prep Your System for Warmer Weather

May 16, 2025

Spring in the Upstate means blooming azaleas, blue-sky weekends, and—yes—rising temps that signal it’s time for your air conditioning system to shine. Before your HVAC unit kicks into overdrive for another South Carolina summer, it’s important to give it a little TLC. Whether you’re a longtime homeowner or settling into a new house, staying proactive with spring maintenance is one of the smartest ways to protect your comfort, your wallet, and your peace of mind.

In this guide, we’re breaking down a simple spring HVAC checklist to help you improve HVAC efficiency, prevent breakdowns, and keep your cool all season long. Let’s dive in.

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Why Spring HVAC Maintenance Matters

Think of your air conditioner like a car. Would you drive 100,000 miles without an oil change or tire rotation? Of course not. Your HVAC system needs the same level of seasonal attention to function at its best.
Skipping spring service can lead to:
  • Higher energy bills
  • Reduced system lifespan
  • Costly repairs during peak season
  • Poor indoor air quality
Sanders Heating & Cooling has been helping families stay comfortable since 1953. We know preventive maintenance is the key to long-term savings and reliable performance, especially in our hot and humid Upstate climate.

Your Essential Spring HVAC Checklist

1. Change Your Air Filter

It’s simple, but easy to overlook. A clogged filter blocks airflow, causes your system to work harder, and can stir up allergens—especially during peak pollen season.
Tip: Replace your filter every 1-3 months, depending on household size, pets, and allergy sensitivity.

2. Clear the Area Around Your Outdoor Unit

Leaves, twigs, and yard debris can accumulate around your condenser unit during the winter. This blocks airflow and reduces cooling efficiency.
Tip: Leave at least 2 feet of clearance around your outdoor unit and gently rinse it with a garden hose (power washers can damage the coils).

3. Check Your Thermostat Settings

Spring is the perfect time to switch from heating to cooling and make sure your thermostat is calibrated correctly.
Tip: Upgrade to a programmable or smart thermostat to automate comfort and enhance HVAC efficiency.

4. Clean Your Vents and Return Grilles

Dust buildup can restrict airflow and recirculate allergens through your home.
Tip: Use a vacuum hose with a brush attachment and wipe vents with a damp cloth to freshen up your indoor air.

5. Inspect Your Drain Line

Your air conditioner pulls moisture from the air—and all that condensation has to go somewhere. A clogged drain line can cause leaks or water damage.
Tip: Pour a cup of white vinegar down the drain line to help clear any gunk and prevent mold buildup.

6. Listen for Unusual Noises

Rattling, buzzing, or screeching sounds may indicate loose parts or a failing motor. These small red flags can escalate if ignored.
Tip: If something sounds off, call a professional before the issue grows.

7. Schedule Professional AC Maintenance

DIY care is important, but it can’t replace the expertise of a trained HVAC technician. A professional tune-up is the best way to catch minor issues before they become major repairs.
Tip: If you’re searching for trusted AC maintenance in Greenville, Sanders Heating & Cooling is your go-to local expert.

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Real Results: Boosting HVAC Efficiency

Routine maintenance does more than just reduce the risk of a breakdown. It can improve your unit’s efficiency by up to 30%, helping you cut back on energy bills and reduce your environmental impact. A clean, well-tuned system runs smoother and cools faster—meaning your home stays comfortable without wasting electricity.
And in Greenville, where humidity can linger well into the fall, that efficiency matters.

Signs Your AC Might Need Immediate Attention

Not sure if you need a tune-up—or something more serious? Watch for these common warning signs:
  • Unusual noises or odors when your AC runs
  • Weak or uneven airflow
  • Frequent cycling (turning on and off)
  • Higher-than-usual energy bills
  • Rooms that feel humid or sticky
If you spot any of these, don’t wait until temperatures climb higher. Our team is just a call away to help you diagnose and resolve the issue quickly.

Serving Greenville Since 1953

At Sanders Heating & Cooling, our approach is built on trust, experience, and long-term comfort. We’re proud to be a staple in the Greenville and Upstate community, serving multiple generations of families with expert HVAC solutions.
Whether you’re prepping for spring or upgrading an older system, we’re here to help every step of the way. Our technicians are friendly, knowledgeable, and trained to deliver the same level of care we’d give our own families.

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