Lippert Red LED 3 fault code — Slide-out
Applies to: In-Wall Slide-out
What Red LED 3 means
The Lippert In-Wall Slide-out troubleshooting manual maps Red LED 3 to Low Battery: voltage below 8 V DC at the start of cycle.
Owner-safe checks
- Stop operating the slide.
- Check battery state from an installed monitor.
- Charge the RV battery before retrying if safe.
Service-only work
- Controller reset, motor synchronization, encoder checks, wiring repair, motor service, and manual override should follow Lippert documentation or qualified service.
Safety boundary
Do not place hands or tools near moving slide mechanisms. Keep people clear and do not force the slide if current, short, or controller faults appear.