Keeping a capacitor working is key to keeping cool
AC capacitor lifespan averages 10 years, though your unit's capacitor can last anywhere from 5 to 20 years depending on brand quality and maintenance.
Expect to pay $100 to $250 for a new AC capacitor, with total repair or replacement costs rarely exceeding $500 for professional service.
You can extend your AC capacitor's life by giving your unit regular breaks to cool down and choosing quality equipment when replacing your system.
Hiring a local HVAC repair professional provides reliable diagnosis and repair when your AC won't start or runs inefficiently, keeping your home comfortable.
When it comes to the hard work an AC unit does to keep you cool, an AC capacitor can be something of an unsung hero. This little metal cylinder, which is a lot like a rechargeable battery, has the important job of giving your AC unit the power boost it needs to get running. But eventually, they wear out and need to be replaced. So, how long does an AC capacitor last, and when should you start shopping for a replacement?
On average, AC capacitors last 10 years, but their life span can range anywhere from five years to 20. You’ll get more life out of your capacitor if you choose a dependable brand and keep up with regular maintenance.
There are many factors that can have an impact on the life span of your AC capacitor. Unfortunately, some of these factors, like the weather, may not be in your control.
Here are some factors that can impact the longevity of your AC capacitor.
If you live in a place with high heat and humidity—like Florida—your AC capacitor may rust and wear out more quickly. (Of course, living in an area with high heat and humidity also means you’ll run your AC more often, which leads to faster wear and tear.)
As is true of all things mechanical, more use means quicker deterioration. So, if you run your AC constantly, your run capacitors may wear out more quickly. On the other hand, your start capacitors may last longer since you’re not starting up the unit very often—you’re just leaving it on.
If you buy your AC from a reputable vendor and have it professionally installed, chances are good that your capacitors will last closer to the larger end of the five- to 20-year span. But if you have a refurbished AC with mismatched parts, an older unit, or if the unit was installed improperly, your capacitor may not last as long.
How can you tell when your AC capacitor may be reaching its capacity? Here are some telltale signs:
The AC unit fails to turn on, or it turns off by itself: Since capacitors are the primary parts involved in starting your AC and keeping it running, these issues can point to a bad capacitor.
Your AC unit is making a humming noise: While there are a lot of reasons an AC might make strange noises, a bad capacitor can be one of them, so it’s worth investigating.
Your electric bills unexpectedly rise: If the price of electricity has remained the same and your usage has, too, utility sticker shock might point to a bad capacitor. A failing capacitor means your unit must work much harder (and use more energy) to get started and stay running.
While some aspects of AC capacitor longevity are out of your control, you may be able to increase the life span of your capacitor by following a few tips.
Give your AC a break sometimes: A capacitor that’s constantly running will likely die sooner than one that occasionally gets to chill out—metaphorically speaking. Be sure to turn your unit off for a few hours every so often so that the capacitor has a chance to fully cool down.
When shopping for an AC unit, don’t skimp on quality: It can be tempting to cut corners and save money, but buying a unit with a mismatched capacitor could cause you headaches down the line. Opt for better quality out of the gate for the best outcomes. Call a pro if you want advice on what unit to buy.
AC capacitors are located deep in the heart of your AC unit, so let a professional service them if you’re suspecting or experiencing trouble. That said, if your AC is acting funny and you think the capacitor may be involved, one simple troubleshooting step worth trying is simply turning the unit off for a few hours and then powering it back on again.
Sometimes, a part—capacitor or otherwise—may just need a chance to cool down to get back to proper working order.
AC capacitors are a fairly affordable part, and they often come with an equipment warranty from the manufacturer. Your home warranty may also cover air conditioning repair, including capacitor issues, so consult your plan if you have one.
If your AC capacitor is bad, don’t worry. The problem rarely means you’ll need a total AC replacement. If you need a new AC capacitor, they cost $100 to $250. In some instances, your local HVAC repair company may be able to repair your existing capacitor, but repair may not be as cost-efficient as replacement. Prices for both repair and replacement rarely exceed $500, so talk to a pro in your area for advice on the best course of action.
Great company! Price was competitive, technician showed up on time and completed the job (exterior electric Radon fan replacement) quickly. Would hire them again.
MaGen Property Inspections and Radon MitigationAs usual with ECO, tech Jordan was outstanding, very professional, very knowledgeable, and very thorough with repairs made to tankless water heaters. Very highly recommend ECO!!!
Eco Plumbers, Electricians, and HVAC TechniciansRaven and crew does absolutely fantastic job. They are very professional if any concerns were to occur with any of her work she always took responsibility and finished out with a great job. I have worked with her business for a year and have always been satisfied. Very trusted business and...
Creations of Transformation LLCI would recommend this company to anyone! He showed up on time, was friendly, completed a very difficult repair on our dryer vent cover, was responsive, and pricing was extremely fair and competitive. I would have him back to do any of our repairs or cleanings without hesitation!
U.S.A. Dryer Vent, LLCAce Fireplace Services' chimney sweep service is truly exceptional. They used advanced technology to ensure a thorough cleaning process, and my chimney has never looked better. I highly recommend their services.
Ace Fireplace ServicesThe technician was very professional and friendly. He answered all my questions and was very thorough. He left the fireplace area very clean . He inspected from the roof and advised me as to other work that might need to be done. There was no pressure there. I was very satisfied with the...
Supreme brick & chimneyExcellent experience with hiring Tether House to Mount our 77’ Samsung TV in our bedroom. Fast, friendly, and knowledgeable. Highly recommend.
Tether HouseOn time, clean and finished fast. Windows seem sturdy and the finish is good. Caulking was done with no smudges. Would recommend.
Window Depot USA of Central OhioGreat job...edging and pre clean up went well with a great job with seal coat. Friendly, efficient and professional.
All Star Paving and SealingGood workers and they do a good job.
Mira ConstructionFrom average costs to expert advice, get all the answers you need to get your job done.
AC capacitor costs can vary based on labor prices in your area and the specific type of capacitor you need. Explore all cost factors here.
Factors such as labor and parts impact the final price of repairing a window AC unit. Learn all of the costs associated with window air conditioner repair.
When determining your AC coil cleaning cost, you’ll need to factor in the type, cleaning method, and more. Our cost guide will show you what to expect.
An air conditioner capacitor is basically a small, cylindrical battery that holds enough energy to start your AC without pulling electricity from the home.
Wondering how long AC units last? Check out this helpful guide with common signs it’s time to replace your AC unit.
A broken AC capacitor can stop your air conditioning unit in its tracks. Find out how to test an AC capacitor using a multimeter by following these steps.
