Is your Lippert through-frame slide-out motor running, but the room isn’t moving? If you can hear the electric motor turning but the slides not moving the problem is almost certainly between the motor and the actuator.

In this guide, we’ll explain how the electric motor drives the slide through the gearbox and why a spinning motor with no slide movement points to an internal gearbox failure. We’ll also show you how to inspect the gearbox by removing the access cover with nothing more than a Phillips screwdriver, allowing you to identify damaged gears or other common failures before replacing unnecessary parts.

If your motor runs but the slide doesn’t move, this step-by-step guide will help you quickly pinpoint the cause and determine the proper repair.