When a central air conditioner stops working, it can quickly create an uncomfortable situation in your Atlanta home, especially during the peak of summer. Air conditioners are made up of many components that must work together, so when your system shuts down, the issue could come from several possible causes.
Common Reasons a Central Air Conditioner Stops Working
If your system suddenly stops cooling, some of the most common causes include:
- Thermostat issues: Incorrect settings or a malfunctioning thermostat can prevent your AC from starting. Learn more in this article about thermostat troubleshooting tips.
- Clogged air filter: A dirty filter restricts airflow, leading to poor cooling and potential system shutdown. This is why regular air conditioning maintenance is essential.
- Tripped breaker: Power surges or electrical overloads may cause the circuit breaker to trip.
- Refrigerant problems: Low refrigerant levels or leaks affect your system's ability to cool properly.
- Faulty capacitor: One of the most overlooked yet critical issues.
Along with capacitor issues, there are several common AC problems homeowners face that may stop their system from working properly.
Among these, a faulty capacitor is one of the most frequent reasons a central air conditioner stopped working and often requires professional attention.
What Does the Capacitor Do in an Air Conditioner?
The capacitor acts like a battery for your HVAC system. It stores and delivers the electrical energy needed to start and run your air conditioner. Most central air conditioning systems have more than one capacitor:
- Start capacitor: Gives the motor the extra boost it needs to start up.
- Run capacitor: Provides continuous power to keep the motor running efficiently.
If the capacitor fails, your air conditioner may struggle to start, make humming noises without blowing cool air, or shut down completely.
Signs of a Bad Capacitor
Watch for these warning signs that may indicate a capacitor problem:
- Your AC won't start even though the thermostat is set correctly.
- The system hums or clicks but never turns on.
- The air conditioner turns off shortly after starting.
- You notice uneven cooling or frequent system cycling.
When a central air conditioner stops working due to a faulty capacitor, it is best not to attempt a DIY fix. Capacitors store high voltage even when the system is off, and can be dangerous to handle.
How Estes Services Can Help
At Estes Services, our trained HVAC technicians diagnose capacitor failures and replace them safely and efficiently. In this video on our YouTube channel, we explain how a broken capacitor can cause your system to stop working and what our team does to restore comfort in your home.
If you suspect a capacitor issue or your central air conditioner stopped working unexpectedly, contact Estes Services for expert AC repair in Atlanta. We offer same-day service appointments to get your home cool again quickly.
Schedule Your AC Repair Today
Don't let a faulty capacitor or other issues leave your family without comfort. Schedule your AC repair appointment today or contact Estes Services for immediate assistance. If your system is older and repairs are frequent, it may be time to consider a new air conditioning installation.
Frequently Asked Questions
Why did my central air conditioner suddenly stop working?
The most common reasons include thermostat issues, clogged filters, tripped breakers, refrigerant leaks, or a faulty capacitor. A professional Estes HVAC technician can quickly diagnose the issue.
What are the signs of a bad AC capacitor?
Warning signs include your system not starting, humming or clicking noises without turning on, frequent shutdowns, and uneven cooling throughout your home.
Can I replace an AC capacitor myself?
No. Capacitors hold high voltage even when the system is off, making them dangerous to handle. It's best to call a licensed HVAC technician for safe replacement.
How fast can Estes Services repair my air conditioner?
We offer same-day AC repair appointments in Atlanta to restore your comfort as quickly as possible. You can schedule your service online or call us directly.
