Why Your AC Might Be Running Constantly—and What You Can Do About It
During a hot Shelby summer, it's normal for your air conditioner to run more often—but if it seems like it's running all the time, that's a sign something may be wrong. A constantly running AC isn’t just annoying—it could be driving up your energy bills and putting unnecessary wear on your system. At Bill Shuford Heating & Air, we often get calls from Cleveland County homeowners wondering why their AC won’t shut off. Here are a few of the most common reasons—and what you can do about them.
1. Dirty Air Filter
A clogged or dirty air filter can restrict airflow, making your system work harder and longer to cool your home.
What to do:
Check your air filter and replace it if it's dirty. We recommend checking it monthly during peak summer months.
2. Thermostat Issues
Sometimes, the issue isn’t the AC at all—it’s the thermostat. A malfunctioning or poorly placed thermostat can give incorrect readings, causing your system to run longer than necessary.
What to do:
Make sure your thermostat isn’t near windows or heat sources. If it’s old or unresponsive, it might be time for an upgrade to a smart thermostat for better control and efficiency.
3. Low Refrigerant Levels
If your AC is low on refrigerant (the chemical that cools the air), it may struggle to reach the set temperature—causing it to run continuously.
What to do:
This isn’t a DIY fix. Contact our certified technicians to check for refrigerant leaks and recharge the system safely.
4. Undersized AC Unit
If your AC is too small for your home, it will run nonstop trying to keep up with the demand, especially during high heat days in Shelby.
What to do:
A proper load calculation can determine if your system is the right size. We can help assess and recommend the best system for your space.
5. Leaky Ductwork
Air leaks in your duct system can waste cooled air, causing your system to run longer to compensate.
What to do:
Have your ducts inspected and sealed if needed. This not only improves efficiency but also enhances indoor air quality.
6. Dirty or Blocked Condenser Coils
The outdoor condenser unit needs to release heat to keep your home cool. If it’s dirty or obstructed, it can’t work properly.
What to do:
Keep the area around your condenser clear of debris, leaves, and grass. Schedule seasonal maintenance to keep it clean and efficient.
Trust Shelby’s Local HVAC Experts
If your AC is running constantly and you’re not sure why, Bill Shuford Heating & Air is here to help. Our experienced technicians can quickly diagnose the issue and get your system running efficiently again. Serving Shelby, NC and the surrounding areas since 1983, we’re committed to keeping your home comfortable all summer long.
Need help with your AC?
Call us today at
(704) 484-0025 or
schedule a service online.




