Replacing Ballast

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

Carefully pry out on the front cover of the unit, unsnapping the plastic fasteners, and remove front cover.
Remove the three screws securing the control panel and hinge the panel down.
Using a small screwdriver, press down on the wire retainers on the ends of the ballast and remove wires from ballast.
Remove screws securing the ends of the faulty ballast and remove ballast.
Install new ballast in reverse order. Use the color coded hart on the ends of the ballast on re-installing the wires.