South Jersey homeowners rely on their HVAC systems year-round—cooling in humid summers, heating in snowy winters, and everything in between. With such heavy seasonal demand, it’s no surprise that HVAC issues are common across the region.
Whether you’re noticing uneven temperatures, strange noises, or a system that just doesn’t keep up anymore, understanding the most frequent HVAC problems can help you know when it’s time to call in a professional.
Here are the issues we see most often in South Jersey homes:
1. Clogged Air Filters From Seasonal Allergens
South Jersey’s pollen counts can spike hard in spring and early summer. When filters clog with pollen, dust, and pet dander, your HVAC system has to work overtime.
Common symptoms include:
- Reduced airflow
- Higher energy bills
- Hot and cold spots
- A system that runs constantly
Solution: Replace filters every 1–3 months—more often during heavy pollen seasons.
2. Short Cycling Caused by Oversized or Aging Systems
South Jersey’s summer heat waves can expose sizing and efficiency issues. A system that turns on and off too quickly (“short cycling”) wastes energy and reduces comfort.
Possible causes:
- An oversized unit
- Dirty filters
- Thermostat issues
- Refrigerant leaks
- Poor airflow
If your system constantly starts and stops, professional maintenance is needed to diagnose the root cause.
3. Thermostat Malfunctions
Thermostats in older South Jersey homes are often outdated, improperly placed, or simply failing.
Symptoms include:
- Inconsistent room temperatures
- System not turning on/off when it should
- Unusually high utility bills
Upgrading to a smart thermostat can provide better control—and lower energy costs.
4. Frozen AC Coils During Humid Summers
High humidity is a South Jersey trademark—and it can cause evaporator coils to freeze.
Why it happens:
- Low refrigerant
- Poor airflow
- Dirty coils
- Clogged filters
What you’ll notice:
- Warm air coming from vents
- Ice on the outdoor or indoor unit
- Water pooling when the ice melts
Addressing it early prevents long-term compressor damage.
5. Refrigerant Leaks in Older AC Units
Homes along the coast and in humid inland areas often deal with corrosion over time, leading to refrigerant leaks.
Signs your refrigerant is low:
- AC blows warm air
- Hissing sounds
- Frozen coils
- Reduced cooling performance
Refrigerant issues should always be handled by a licensed technician for safety and compliance.
6. Dirty or Leaky Ductwork
South Jersey’s mix of older homes and newer construction means ductwork varies widely in condition.
Leaky or dirty ducts lead to:
- Uneven room temperatures
- Higher energy bills
- Excess dust in the home
- Reduced HVAC efficiency
Duct sealing and cleaning can dramatically improve airflow and comfort.
7. Worn-Out Components From Temperature Swings
South Jersey goes from freezing winters to hot, humid summers—putting heavy wear on HVAC components like:
- Capacitors
- Blower motors
- Belts
- Contactors
When these parts fail, the system may stop working entirely or become unreliable.
8. Drain Line Clogs
AC units remove a ton of humidity from South Jersey air. Over time, algae and debris can clog condensate drain lines, causing water leaks or system shutdowns.
A quick annual maintenance check helps prevent clogs before they damage flooring, drywall, or ceilings.
How Wynnow Helps South Jersey Homeowners Stay Comfortable
HVAC issues often show up at the worst possible times—a heatwave, a cold snap, or right before company arrives. That’s where Wynnow comes in.
Our licensed and insured HVAC professionals can:
- Diagnose system issues
- Perform repairs and tune-ups
- Replace worn components
- Improve airflow and duct performance
- Recommend upgrades when needed
Whether your system is struggling to cool, won’t heat evenly, or simply needs routine maintenance, Wynnow makes it easy to get fast, reliable service.
Final Thoughts
HVAC problems are common in South Jersey due to climate swings, humidity, and heavy seasonal use. Recognizing the early warning signs can save you money, prevent breakdowns, and keep your home comfortable all year long.
Need help with an HVAC issue?
Get in touch with Wynnow today to schedule a service call and get your system running at peak performance. By the way, if you found this blog helpful please check us out on Facebook, Instagram and X for more!