This ballast assembly is used on Crystal Pure Systems and now has a small LED bulb to indicate there is power to the ozone generator. On older systems,the bulb is black, (and looks burnt out), even when new. We recommend replacing the ballast if it’s over 8 years old, as a preventative measure. A defective ballast may blow out your new Ozone Generator, which is not covered under warranty.
There is a wiring change required to make the new ballast work in your spa, and we include an instruction sheet to help you.