During the hot summer months, we rely on our central air conditioning systems to stay cool and comfortable. Yet even the best maintained units can have mechanical issues from time to time. If your outside central air unit isn’t turning on, it can be frustrating, especially during the peak of summer heat. It’s essential to figure out why and find a solution as soon as possible.
Here are six common reasons why your unit might not be functioning, along with guidance on when to call an HVAC technician.
1. Power Issues
The most straightforward reason for your AC unit not turning on could be a power issue. Sometimes, a power surge or a simple overload can cause the breaker to trip. If resetting the breaker doesn’t solve the problem, there could be a more significant electrical issue at play.
2. Thermostat Problems
The thermostat controls your AC unit, so if it’s not working correctly, the unit might not turn on. Ensure that the thermostat is set to “cool” and the temperature is set lower than the current room temperature. Also, check the batteries in the thermostat if it uses them. If the thermostat seems unresponsive or inconsistent, it might need replacement or recalibration.
3. Dirty Air Filters
Air filters should be cleaned or replaced regularly. A dirty filter restricts airflow, causing the system to overheat and shut down as a safety measure. If the air filter looks clogged or hasn’t been replaced in a while, try replacing it to see if that solves the problem.
4. Clogged Condensate Drain Line
Air conditioning units generate condensation, which is typically drained away through a condensate line. If this line becomes clogged, the unit may shut off to prevent water damage. Check for any visible clogs and clear them if possible. If the drain line is inaccessible or you can’t remove the clog, it’s time to call a technician.
5. Faulty Capacitors
Capacitors are small but crucial components that help start and run the motors in your AC unit. Over time, capacitors can wear out or fail. If your unit hums but doesn’t start, or if it starts slowly and runs intermittently, a faulty capacitor could be the culprit. Handling capacitors can be dangerous due to the electrical charge they hold, so it’s best to leave this to a professional.
6. Refrigerant Leaks
Your AC unit relies on refrigerant to cool the air. If there’s a leak, the unit won’t be able to function properly. Signs of a refrigerant issue include ice on the refrigerant lines, a hissing sound, or the unit blowing warm air. Refrigerant leaks not only reduce efficiency but can also harm the environment, making it essential to call an HVAC technician to diagnose and repair the leak.
When to Call Anthony’s
While some issues can be resolved with simple troubleshooting, others require the professional expertise of Anthony’s Plumbing, Heating, & Air Conditioning. If you’ve checked the power supply, thermostat, air filters, and condensate drain line and your unit still doesn’t work, or if you suspect a more complex issue like a faulty capacitor or refrigerant leak, call Anthony’s right away. We’ll get you back to cool in no time.
