Capacitors are small but essential components in your air conditioning system, and their failure is one of the more common reasons homeowners call for repair. Old Glory Air Conditioning and Heating explains what a capacitor does and the warning signs that indicate it may be failing.
Capacitors store and release electrical energy to help start and keep your air conditioner's compressor and fan motors running. Without a properly functioning capacitor, these motors may struggle to start or may not run efficiently once they do.
One of the most common signs of a failing capacitor is your air conditioner struggling to start, sometimes requiring multiple attempts, or a noticeable delay between when the thermostat calls for cooling and when the system actually begins running.
If you hear a humming sound coming from your outdoor unit, but the system doesn't actually turn on, this often points to a capacitor that's providing insufficient power to start the compressor or fan motor.
A failing capacitor can sometimes allow the system to start, only for it to shut down again shortly afterward, since it's unable to maintain the steady power needed to keep the motors running consistently.
In some cases, a failing capacitor may show visible signs of damage, such as a bulging or leaking casing, though this typically requires a technician to safely inspect since capacitors store electrical charge even when the system is off.
Even if your system does start, a weakening capacitor can cause the compressor to run less efficiently, leading to reduced cooling performance despite the system appearing to operate normally.
As a capacitor weakens, your system's motors may need to work harder to compensate, which can lead to a gradual increase in energy consumption even before more obvious symptoms appear.
Continuing to run a system with a failing capacitor can place additional strain on the compressor and fan motors, potentially leading to more expensive repairs if the underlying issue isn't addressed promptly.
Capacitors store electrical charge and can pose a safety risk if handled improperly, making capacitor testing and replacement a task that should always be left to a licensed HVAC technician.
If you suspect your AC's capacitor may be failing, our technicians can safely diagnose and replace the component, restoring reliable operation to your cooling system.
