I know what you’re thinking: “Ugh, not another one of those posts about how to properly care for your air conditioner.”

But trust me, this is something you need to know about. Especially now that the weather is starting to get hotter and hotter.

So, does a new AC capacitor need to charge? What should you do? Keep reading to find out!

does a new ac capacitor need to charge

Does A New AC Capacitor Need To Charge 

Generally, a capacitor that is connected with your AC unit is continuously charged and discharged by electricity flow. Therefore, it doesn’t require separate charging like any electronic device as it is charged within itself while storing electricity.

The capacitor of an air conditioner is not too big to keep a huge amount of charge. However, It is still a high voltage device and risky to handle. Moreover, as the working process of the capacitor is to send high power to start the motor, it can be harmful.

As it stores electricity, touching one could be dangerous even if the power is turned off. You can feel a mild shock if you are in touch with the capacitor.

How Long Does It Take AC Capacitor To Charge

The capacitor of an air conditioner works mainly as a booster for your AC motors. Its main function is to send a powerful surge to start the high-powered motors. Once they’re started, it is easier to maintain it with comparatively low power.

That’s why a capacitor doesn’t need much time to be charged. The AC circuit could be charged in less than 20 seconds, and the charge is held for 40 minutes minimum. So, it can supply power continuously after it starts.

how often should you replace ac capacitor

In general, you should replace your AC capacitor every 3-5 years. However, if you live in a particularly humid or dusty environment, you may need to replace it more often. Also, if you notice that your AC isn’t cooling as well as it used to, it may be time to replace the capacitor.

Can I Charge A Capacitor With Ac 

AC is not a wise way to charge a capacitor, but you can charge the capacitor by an alternative source like Ac.

In this process, when you disconnect your AC from the electricity source, then the time of disconnection will decide how much charge is left for the capacitor. You’ll be able to use it according to the amount of charge left.

Do You Need Discharge Ac Capacitor

If you want to work on an internal division of an air conditioner, then you have to discharge the main two capacitors. These capacitors are called the run and the starts capacitor.

If you don’t discharge the capacitors, you might get an electric shock while touching them, which is not good for you.

So, when you have work on the internal side of the AC, you must shut down your air conditioner circuit breaker and main electric panel. Next, discharge the AC capacitor and then go forward with the work.

Will AC Fan Run If Capacitor Is Bad

A capacitor helps to keep the fan motor running. It is essential for many functions within the air conditioner. But if the capacitor is bad, then it might cause several problems and even damage your AC. For example, it could pressurize the fan motor and ultimately cause it to burn completely. 

So, if the capacitor is bad, the fan will run, but it is not well efficient for the Ac and also for you.

How Long Does It Take For An AC Capacitor To Discharge

After one period of time, an AC capacitor can discharge 63% of its voltage. According to this calculation, I can say that after a five-time period, a capacitor can discharge to 0% of its voltage.

So, I can say that five times constant is safe for a capacitor to discharge all of its voltage.

How to determine if you have a bad AC capacitor and need a replacement

If your AC isn’t cooling as well as it used to, or if it’s cycling on and off more frequently than usual, then you may have a bad AC capacitor.

To determine if this is the case, start by unplugging your AC and removing the cover. Locate the capacitor and check to see if it’s bulging or leaking. If it is, then you need a replacement. Otherwise, you can try testing the capacitor with a multimeter to see if it’s still functioning properly. If it’s not, then you’ll need to replace it as well.

AC capacitor replacement isn’t too difficult of a task, but it’s one that you should leave to the professionals if possible. Replacing an AC capacitor requires working inside your unit with potentially dangerous high voltages, so unless you know exactly what you’re doing and are familiar with electrical components, it may be best to schedule service by a professional.

Tips for prolonging the life of your AC capacitor

  • Make sure that your capacitor is properly installed, and that all of the wires are securely attached.
  • Keep the area around your capacitor clean and free of debris.
  • Avoid overloading your capacitor with too much power.
  • Make sure your capacitor is properly grounded.
  • Use wire mesh, also known as chicken wire, to protect your AC capacitor from potential damage.
  • Check the voltage of the capacitor periodically with a voltmeter to determine how much longer it will last.
  • Change your AC capacitor before it fails completely and leaves you without cooling or heating.
  • Have your capacitor replaced by a professional HVAC technician.


An AC capacitor is a vital part of an air conditioner. As it is continuously charged and discharged by electricity flow, there is no need for separate charging of the ac capacitor. I hope this answers your quest to does a new ac capacitor need to charge . However, whenever you need to do anything related to the capacitor, be aware and careful to discharge it properly. It could be dangerous and might cause an accident. Take professional help if required.

Source: http://www.ehow.com/way_5270580_prolong-life-ac-capacitor_.html

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