10 Warning Signs Your A/C Needs Service

As the temperatures rise in Ohio, your air conditioner becomes essential to your home comfort. But how do you know when it’s time to call for service before a full breakdown happens?

We’ve created a simple infographic to help homeowners recognize the top 10 signs that your A/C may need maintenance or repair. Catching these early can help you avoid bigger (and more expensive) problems down the line.

1. Increased Energy Bills

If your energy usage hasn’t changed but your utility bills are rising, your A/C system could be working harder than it should—often due to dirty coils, low refrigerant, or worn parts.

2. Reduced Cooling Efficiency

If your system is running but not keeping your home as cool as it used to, it may need a professional inspection to restore performance.

3. Strange Noises

Grinding, squealing, or banging sounds are not normal. These noises could indicate failing components like the motor, fan, or compressor.

4. Weak Airflow

Poor airflow might be caused by a clogged filter, blocked ducts, or a failing blower fan. All can strain your system and reduce comfort.

5. Foul Odors

A musty smell may indicate mold in the system. Burning or electrical smells could be a serious warning sign that needs immediate attention.

6. Leaks

Water or refrigerant leaks around your unit can signal clogged condensate lines or refrigerant issues. Both can cause significant damage if ignored.

7. High Indoor Humidity

Your A/C should remove humidity as it cools. If your home feels sticky or damp, your system may be underperforming or improperly sized.

8. Constant Cycling

Frequent on-off cycles (also known as short cycling) can wear out your system faster and may be a sign of thermostat or electrical issues.

9. Thermostat Issues

If your thermostat isn’t responding or is reading temperatures incorrectly, it could prevent your system from running efficiently.

10. Age of the System

If your system is over 10–15 years old and showing multiple signs from this list, it may be time to consider replacement instead of repair.

🛠️ Don’t Ignore the Signs—Call a Pro

At Service First Heating and Cooling, we believe in honest, pressure-free service. If you’re noticing any of these warning signs, schedule an A/C tune-up or diagnostic visit before it leads to a mid-summer breakdown.

We’re proud to serve Canal Winchester, Pickerington, Carroll, Lithopolic, Groveport, and surrounding areas with fast, friendly, and expert HVAC service.

📞 Call today or book online—we’re here to keep your home cool and comfortable all summer long.