As the warmer months approach Chester County, ensuring your air conditioner is in top shape is essential. Ignoring small issues now could lead to major breakdowns just when you need cooling the most. At J. Halligan & Sons Heating and Air Conditioning, we’ve compiled the top five warning signs your AC may need repair—before summer heatwaves hit.

1. Weak Airflow

If your vents are blowing weak or barely cool air, your system may have a clogged filter, duct problem, or failing compressor. Poor airflow can strain your unit and reduce efficiency.

2. Unusual Noises

Grinding, rattling, or buzzing sounds aren’t normal. These noises can point to loose parts, motor issues, or debris caught in your fan blades—all signs you need professional HVAC service.

3. Bad Odors

Musty or burning smells from your vents could indicate mold in your ducts or electrical issues. Ignoring these smells may put your air quality and safety at risk.

4. Constant Cycling

Does your system turn on and off too frequently? Short cycling might mean your thermostat isn’t working properly, or your AC is too large for your home. Either way, it hurts energy efficiency.

5. Rising Energy Bills

A sudden spike in your electric bill without increased AC use often signals your unit is working harder than it should—usually due to a failing component or dirty system.