In the 21 years that I’ve had my WW high velocity-Laser, I have a laser computer in mine, I’ve learned most problems can be traced down to just a handful of things. Although, sometimes it can be hard to figure out which one of these things is the problem. Most of your problems will be outside in the bay. A bad connection, festoon cable, proximity switch or cable, photo electric eye or amplifier, the occasional gear box, rollers, tires, swivels, etc. And occasionally, some weird problem! Very seldom will the problem be inside the main JO cabinet on the pump station. In the past 21 years I’ve changed 3 things inside in the main cabinet. The speed controller, the motor contact relay for the soap pump motor, and the 24 volt dc power supply. At least that’s been my experience with my brand of automatic.