How Long Do AC Capacitors Last on Average in Mequon, WI?
Professional Services
May 14, 2025
How long do AC capacitors last? A typical capacitor in an air conditioner will last 10 years, but the AC capacitor lifespan could be as long as 20 years. Having maintenance done as part of your regular HVAC services in Mequon, WI, can extend the lifespan.

Learn more about the importance of this component and how you can improve its performance and lifespan.
Importance of an AC Capacitor for Your Cooling System
Because southeast Wisconsin has four distinct seasons of weather, you need HVAC systems you can trust. Summers in the Mequon, WI, area are humid, with temperatures frequently surpassing 80 degrees.
You’ll want your cooling system to run smoothly during the warmest summer days. The AC capacitor is a key component for the air conditioner's operation because it moves refrigerant through the system. Without fully functioning capacitors, cooling systems will not keep your home comfortable.
Factors That Affect How Long AC Capacitors Last in Mequon, WI
How long do AC capacitors last, and what factors affect their lifespan?
Frequency of Use of the Cooling System
People who use their air conditioners more often will place more stress on the system and the capacitor. In the Mequon, WI, area, you won’t need to run the cooling unit as many months out of the year as people in southern parts of the United States.
However, during Wisconsin summers, you can put stress on the system because you’ll likely run it regularly during times of high humidity. You should have professional maintenance done on the capacitor before the primary cooling season arrives to ensure it’s ready for extended use.
Problems With Voltage Fluctuations
When replacing capacitors, some inexperienced technicians might put in a component that doesn’t have a voltage rating high enough for the system. Electrical component wear and voltage fluctuations can negatively affect the performance of capacitors, leading to a shorter lifespan.
Issues With Excessive Heat and Humidity
When your air conditioner’s components receive regular exposure to high heat and humidity, these environmental conditions might shorten the lifespan of the capacitor. Challenging environmental factors create stress on the unit and the capacitor.
If you ever see rust or corrosion on the capacitor, call cooling system technicians immediately for repair and maintenance to avoid a capacitor failure.
Age of the Air Conditioning System
An air conditioner will typically last 15 to 20 years with proper maintenance. As the AC unit ages, though, the capacitor will likely start showing signs of wearing out.
Mequon, WI, has had a steady population growth since the end of World War II. That means residential housing and air conditioning systems in this region were installed at many different times.
After buying a home, if you are unsure how old your AC capacitor is, expert cooling technicians can inspect the system and determine its age. This can be helpful information as you consider whether you need to budget for an air conditioner replacement in the next few years.
Spotting Signs of Problems With Air Conditioning Capacitors
One of the things homeowners should know about air conditioning systems is how to recognize signs of problems with an AC capacitor. These can be early indications that your cooling system’s performance is suffering.
How long do AC capacitors last when these problems occur? You might struggle to receive the average 10 years of performance from this component when these signs are present. Some of the signs of capacitor failure to watch for include:
- System won’t turn on
- AC vents blow warm air
- Clicking noises at startup
- Humming noises during operation
- Odor resembling smoke
If your energy bills show an increase from one summer to the next without an obvious difference in the weather, a failing capacitor could be to blame.
Trust Professional Services for Increasing Your AC Capacitor Lifespan in Mequon, WI
Our team at Professional Services can improve your HVAC system performance by keeping your capacitor functioning as intended. Our maintenance work allows the cooling system to run more efficiently and even deals with the causes of mold in air conditioners.

We serve all the neighborhoods in the Mequon, WI, area, including those near the Mequon Nature Preserve and the River Club of Mequon Golf Course.
How long do AC capacitors last, and what is the best way to improve their lifespan? To receive longer than the average of 10 years of life from an air conditioning capacitor, routine maintenance is always the best option. To set up an appointment with our team, contact us today.
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