How to Keep Your AC Running Smoothly During Coastal Humidity
Living on the coast of North Carolina comes with its perks—beaches, breezes, and beautiful sunsets. But if you’ve lived in Wilmington long enough, you know the coastal humidity can be brutal—especially during the height of summer. For your air conditioning system, that humid air isn’t just uncomfortable; it’s a real challenge. At Fulford Heating & Cooling, we’ve been helping homeowners in Southeastern NC stay cool for over 45 years. Here are our top tips to keep your AC running efficiently and reliably in our unique climate.
1. Change Your Air Filters More Frequently
High humidity levels mean your HVAC system is working harder to filter out moisture, dust, and allergens. In our area, you should check your filter every 30 days during the summer months and replace it as needed—especially if you have pets or live near the Intracoastal Waterway.
2. Schedule Regular AC Maintenance
Humidity puts extra strain on your cooling system. With preventative maintenance, our certified technicians can:
- Clean your coils and condensate drain line (critical in humid climates)
- Check refrigerant levels
- Inspect for corrosion or salt damage (common in coastal regions)
A seasonal tune-up keeps your AC running smoothly and helps you avoid mid-summer breakdowns.
3. Use a Dehumidifier to Support Your AC
While your AC naturally removes some moisture from the air, it isn’t designed to handle Wilmington’s thick summer humidity on its own. Installing a whole-home dehumidifier can:
- Lighten the load on your AC
- Improve indoor air quality
- Prevent mold and mildew
Bonus: Your home will feel cooler at a higher thermostat setting, which saves on energy bills.
4. Keep the Outdoor Unit Clear
Your outdoor condenser needs plenty of airflow to work efficiently. Make sure to:
- Clear away grass clippings, sand, and salt buildup
- Trim back bushes and plants at least 2 feet
- Rinse the unit with a garden hose (lightly!) to remove salt spray
Humidity and salt air can corrode your unit over time, so a little cleaning goes a long way.
5. Seal Leaky Ducts and Windows
Humidity loves to find its way inside. Poorly sealed ductwork or drafty windows can let moisture in and cooled air out. Fulford’s techs can inspect your ducts and recommend sealing or insulation upgrades to help reduce that unwanted humidity and improve efficiency.
6. Know the Signs of a Struggling AC
Humidity can mask the early warning signs of AC trouble. Watch for:

- Weak airflow
- Excess condensation or water leaks
- A system running constantly but not cooling well
- Musty or damp odors
Don’t wait until it stops working—call our team for a quick inspection.
Local Expertise You Can Count On
We know Wilmington’s climate inside and out—because we live here too. At Fulford Heating & Cooling, our goal is to keep your family cool, comfortable, and confident in your HVAC system—even on the most humid days of summer. If your AC is struggling with humidity, or you want a professional tune-up, schedule an appointment with our expert team today.






