An AC capacitor will generally last around 20 years under the right conditions. However, there are a few factors that can significantly reduce its life span: Choosing too low of a voltage for the existing unit Prolonged exposure to high heat and hot climates Neglecting AC maintenance Not servicing your AC regularly Poor product design or faulty parts To get the most out of your capacitor, keep the outdoor AC system in a clean and shaded area and follow our air conditioner maintenance guide. It’s also important to seek qualified AC services rather than trying to fix anything yourself.