Ac Capacitor

Understanding AC Capacitors: A Key Component in Your Cooling System

With the extreme temperatures of summer, how to support your air conditioning (AC) unit will be important to keeping a comfortable indoor environment. One little but powerful part of your AC unit, the AC capacitor, is one of the parts that is missed during repairs of an AC unit. Without the capacitor, your air conditioner will not be able to start, it may run inefficiently or, worse yet, it may not run at all. In this article, we will discuss the AC capacitor and everything that goes along with it - what an AC capacitor does, types of AC capacitors, how to pick an AC capacitor, and the considerations in AC capacitor price - whether you are a technician who has been given an ACS unit general guides, a DIY type wanting to learn more about your AC system, or a homeowner wanting to learn just a little more about your AC system.

What is an AC Capacitor?

An AC capacitor is an electrical component that is used in most air conditioning systems, refrigerators, and HVAC systems. A capacitor's primary function is to store and discharge electric energy to start and run the compressor and fan motors. There are two main types of AC capacitors one is Start Capacitor that provides a jolt of high voltage to start the compressor or fan motor and another is Run Capacitor that provides a continuous supply of voltage to run a motor efficiently. 

Why is an AC Capacitor Important? 

• Motor Performance - Without a capacitor, motors would not have the torque to start or run. 
• Energy Consumption - A good capacitor ensures that your A/C use's it's energy efficiently saving you money on your electric bill. 
• Life of System - Every time your capacitor loses power, it can put your compressor motor in a bind and cause your a/c system to fail and possibly kill the system.

Picking the Right AC Capacitor

Selecting the proper capacitor is critical for both performance and safety of your AC unit. Below are a few things to consider.

1. Capacitance Value (µF): The microfarad (µF) number must equal the original capacitor. Choosing a different specific capacitance value can damage the motor or reduce performance. 

2. Voltage Rating: The common voltages are 370V and 440V. A 440V rated capacitor can replace a 370V rated capacitor however you cannot do that in reverse.  

3. Type of capacitor: You have to determine if your system uses a start capacitor, run capacitor or dual-run capacitor. 

4. Brand & quality: Buying brand name and quality capacitor like GE, Titan Pro or Genteq is a good idea. They will be better, worth your money and last longer.

AC Capacitor price - finding out what factors are affecting the price.

1. Type of capacitor: Start capacitors are typically less than run capacitors, and dual-run capacitors are more expensive because the dual-run capacitor is essentially two capacitors that work together as one run capacitor.

2. Brand: Depending upon the brand manufacturer and whether a name brand, there is usually a mark-up for better components and longer life span.

3. Market demand and availability: The price of AC capacitors could also spike in the late spring and busy summer months because there may be demand for more AC repairs. 

4. Point of purchase: In terms of pricing it is contingent on where you are buying the product, whether from a HVAC supplier or direct manufacturer. Depending on quantities purchased at a time you could also save by purchasing in bulk.

Typical Range of AC Capacitor Price

• Start Capacitors: $5 – $20
• Run Capacitors: $10 – $30
• Dual-Run Capacitors: $15 – $45

How to Replace and AC Capacitor

Note: If you are not confident in your ability to work or with electric components speak to a technician with a license. Capacitors can hold a charge even if you have turned the power off. 

Below are basic instructions for you to replace your own AC capacitor. 

• Shut off power from the circuit breaker to avoid any mishap.
• Locate your capacitor, this should be found inside your AC unit panel.
• Discharge the capacitor with an insulated screwdriver.
• Disconnect and remove the old capacitor and replace it with a new one that has the same specs. 
• Connect the wires as it was earlier.
• Close the panel and turn power back on at the circuit breaker.
• Make sure to take safety precautions and follow the appropriate guidelines from the manufacturer. 

Common Brands of AC Capacitors

• Genteq
• Supco
• Packard

Conclusion

An AC capacitor may not seem to be significant, but it is a big link in ensuring that your air conditioning unit is in working condition and operationally efficient. Whether you are dealing with an old, worn out AC unit, or are installing a new air conditioning unit, being informed on what a capacitor does and what can affect the AC capacitor prices helps you make better maintenance decisions and consequently, better financial decisions. Do not wait until your air conditioning unit has stopped for the day, and has left you with a hot summer day! If your air conditioning system is starting to show signs of wear, consider checking and potentially replacing the capacitor before you find yourself needing to make an expensive repair! Generally, capacitors are inexpensive and relatively easy to replace, this is certainly among the least complex and quickest things you can do to maintain your cooling system in good working order.