AC Not Cooling

AC Not Cooling? 7 Common Reasons and What You Can Do About Them

When the summer heat kicks in, there’s nothing worse than discovering your AC is not cooling your home. Whether it’s blowing warm air or not turning on at all, you need answers, and fast.

At Jersey Boys Plumbing, Heating, and Air, we help homeowners in Haddonfield, NJ, and the surrounding areas stay cool when the temperature rises. In this guide, we’ll walk you through the 7 most common reasons your AC isn’t cooling and what steps you can take to fix it.

1. Dirty or Clogged Air Filter

A dirty air filter is one of the simplest and most common causes of poor cooling.

Signs:

• Weak airflow
• The system struggles to reach the desired temperature
• Dust buildup around vents

What to Do:

Replace your air filter if it’s dirty. Most filters should be changed every 1–3 months, depending on usage and indoor air quality.

👉 Pro Tip: Set a monthly reminder to check your filter, especially during peak summer months.

2. Thermostat Settings Are Incorrect

Sometimes, the issue isn’t with your air conditioner at all—it’s your thermostat.

Signs:

• Thermostat is set to “fan” instead of “cool”
• Dead batteries or an unresponsive display
• Room feels warmer than the set temperature

What to Do:

Check that the thermostat is set to “cool,” the temperature is set properly, and the batteries are working. Consider upgrading to a smart thermostat for better control and energy savings.

3. Frozen Evaporator Coil

If your system is running but no cool air is coming out, your evaporator coil may be frozen.

Signs:

• Ice on the indoor unit
• AC blowing warm air
• Increased humidity in your home

What to Do:

Turn off the system and let the ice melt completely (this may take a few hours). Check your air filter and airflow. If the coil freezes again, contact a pro.

4. Low Refrigerant Levels

Refrigerant is what makes the cooling process possible. If your AC is low on refrigerant, it won’t cool properly.

Signs:

• AC not cooling despite running constantly
• Hissing or bubbling noises
• Ice forming on refrigerant lines

What to Do:

This is not a DIY fix. Refrigerant should only be handled by a licensed HVAC technician. Jersey Boys can diagnose leaks, recharge your system, and get you back to cool comfort fast.

5. Dirty or Blocked Outdoor Condenser Unit

The outdoor unit releases heat from your home. When it’s dirty or blocked by debris, cooling efficiency suffers.

Signs:

• AC runs constantly with little temperature drop
• Warm air from vents
• Visible dirt or debris on the condenser

What to Do:

Turn off the unit and rinse the outside gently with a garden hose (don’t use a pressure washer). Keep grass, bushes, and leaves at least 2 feet away from the unit for proper airflow.

6. Electrical Issues or a Faulty Capacitor

Sometimes, a bad capacitor or tripped breaker can prevent your AC from working.

Signs:

• Clicking sound when the system tries to start
• Fan not spinning
• AC not turning on at all

What to Do:

Check your circuit breaker and reset it if needed. If the problem persists, call a professional. Electrical repairs are dangerous and should be left to licensed HVAC technicians.

7. Your System Is Too Old or Undersized

If your air conditioner is over 10–15 years old, it may simply be worn out or too small for your home.

Signs:

• System can’t keep up on hot days
• High energy bills
• Frequent breakdowns

What to Do:

It may be time to consider a replacement. Jersey Boys offers free AC replacement estimates and will help you choose a properly sized, energy-efficient system for your home.

When to Call the Pros For AC Maintenance

Some issues, like replacing a filter or checking thermostat settings, are easy fixes. But if you’ve tried these solutions and your AC is still not cooling, it’s time to call in the experts.

Why Choose Jersey Boys Plumbing, Heating, and Air?

Homeowners in Haddonfield, NJ, and the surrounding areas trust Jersey Boys for fast, honest, and reliable air conditioning service. Whether you need a repair, replacement, or maintenance, we’re the number one HVAC company to call.

• ✅ Licensed & Insured Technicians
• ✅ Transparent Pricing
• ✅ Same-Day & Emergency Service
• ✅ Local, Family-Owned Company

Don’t Sweat It—Call Jersey Boys Today!

If your AC isn’t cooling, don’t wait for the problem to get worse. Let Jersey Boys Plumbing, Heating, and Air restore your comfort quickly and affordably.

📞 Call now to schedule your AC service in Haddonfield, NJ, or book online for fast, convenient scheduling.