Lippert Slide-Out: “2 red flashes”
warning RV slide-out error codes
What it means
Battery drop-out fault. During a slide cycle the system voltage sagged below roughly 6 volts while the motors were running, so the controller halted the room to protect itself. The green LED also blinks to show which motor (1 blink = motor 1, 2 blinks = motor 2) saw the problem.
Most likely causes
- Weak, undercharged, or aging house battery that collapses under the motor load most likely
- Corroded, loose, or undersized battery/ground cables causing voltage drop common
- Running the slide off battery alone with a large parasitic or simultaneous load common
- Failing battery cell less common
Safe checks you can do yourself
- Plug into shore power or run the generator, then retry the slide.
- Check the house battery resting voltage with a multimeter; a healthy 12V battery reads about 12.6V.
- Inspect battery terminals and the controller power/ground leads for corrosion or looseness.
- Make sure other heavy loads are off while operating the slide.
How to reset / clear 2 red flashes
- Stop pressing the switch and let the fault display.
- Charge or replace the battery / connect to shore power first.
- Energize the extend or retract switch once to reset (clear) the controller.
- Energize the switch again to resume normal operation.
When to call a technician
If voltage is good under load but the code keeps returning, or if you find damaged power/ground cabling you are not comfortable replacing.
Applies to
Schwintek In-Wall slide-out controller (Rev B and later) · Lippert OneControl-managed Schwintek slide systems
FAQ
What does Lippert Slide-Out code "2 red flashes" mean?
Battery drop-out fault. During a slide cycle the system voltage sagged below roughly 6 volts while the motors were running, so the controller halted the room to protect itself. The green LED also blinks to show which motor (1 blink = motor 1, 2 blinks = motor 2) saw the problem.
How do I reset Lippert Slide-Out 2 red flashes?
Stop pressing the switch and let the fault display. Charge or replace the battery / connect to shore power first. Energize the extend or retract switch once to reset (clear) the controller. Energize the switch again to resume normal operation.
What is the most common cause of 2 red flashes on a Lippert Slide-Out?
The most likely cause is weak, undercharged, or aging house battery that collapses under the motor load.
Related · Lippert slide-out
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Sources
- Schwintek In-Wall Slideout System Operation and Service Manual — Error codes section, code 2 (rev b031811) (Lippert Components, Inc.)
- Schwintek In-Wall Slideout Troubleshooting and Component Replacement — Red LED 2 Blinks: Battery Drop Out (RV Upgrade Store (Lippert document))
Note: Blink-count diagnostics require a controller version with diagnostic LEDs; the green-LED motor indication accompanies the red-LED code.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.