Most slides that stop are either a power problem or something in the way: check the 12 V battery's charge, the slide's fuse or breaker, and the room itself for obstructions. Then work out which mechanism your RV has, because the remaining checks and the manual retract differ by type.
RV Slide-Out Not Working: What to Check, by Slide Type
At a glance
- Check power first: the 30 A breaker or fuse, then obstructions and rack debris, then the controller's error code.
- Battery matters even on shore power: the shoreline cord alone may not be enough, and two of the in-wall controller's error codes mean low battery voltage.
- The manual retract is type-specific: in-wall slides are pushed in with the motors unplugged, through-frame slides are cranked by hand with a socket, hydraulic slides are run with a drill on the pump.
On this page (7)
Why won't my slide-out move?
Find your symptom, do the first check, then go to the section for your slide type.
| What is happening | First check | If that is fine |
|---|---|---|
| Room does not move when the switch is pressed | Battery charge and connections, then the 12 V fuse or 30 A breaker | Clear obstructions inside and outside, then read the error code |
| Motor runs but room moves slowly | Low battery voltage, poor ground, or very low outdoor temperature | The room may be in a bind: adjustment is a technician job |
| Room stalls in mid-travel | Crank the manual override a short distance, then retry the switch | Lippert says the actuator is bad and should be replaced |
| Only one side moves 2 to 4 inches and stops | Push the non-moving side by hand while someone holds the switch | If that side moves several inches by hand, a motor shaft has broken |
| Hydraulic room works, then stops, then works | Low battery, or a loose or corroded battery terminal or ground wire | Debris wedged between room and wall, or out of adjustment |
| Controller is flashing a fault code | Reset: press IN on the switch, release, then press IN again | Codes 2 and 3 are low-voltage codes; see below |
Sources: Lippert's In-Wall slide-out troubleshooting manual, Lippert's Through Frame Electric troubleshooting chart and Keystone's 2027 owner's manual.
Power, the switch and the fault codes
Rule out the circuit and the battery first. If the slide's 30 A breaker or fuse blows again as soon as it is replaced, the controller wiring is at fault and needs qualified service.
A weak battery can stall a room that sounds healthy, because the controller draws more current at low voltage. Below 11 V at the controller, charge the battery fully. Shore power alone may not be enough: Jayco says to connect to 120 V AC so the converter charges it.
Tip: Switch off lights and other 12 V loads before running a slide. Charge or jump at the battery itself, never at the in-wall controller's power connections.
In-wall faults show on two LEDs: green blinks once for motor 1 or twice for motor 2, and red blinks the code.
- 2, battery drop out: voltage fell below 6 V while running, or a short in the switch wiring.
- 3, low battery voltage: below 8 V at the start.
- 4, high battery: above 18 V.
- 5, excessive motor current: high current draw, also shown by one side of the room stalling again and again.
- 6, 8 and 9: a shorted motor or wiring fault. Not owner repairs.
Clear dirt clumps or metal shavings from the gear rack with compressed air or a dry brush, and check for a tree, post or vehicle outside and luggage, furniture or an open cabinet inside.
Makers differ on how long to hold the switch, so follow your manual, and always level and stabilize the RV before running a slide.
Which slide type do you have?
Look at the end walls and underneath the room: the mechanism decides the remaining checks and the override.
| Slide type | How to tell | Getting it in by hand |
|---|---|---|
| In-wall (Schwintek) | Two thin tracks on each end wall, fastened to the room | Unplug both motors, push the room in |
| Through frame, rack and pinion | Ram arms under the room, hex on the frame rail | Crank the hex with a 3/4 inch socket |
| SlimRack | Two thin floating tracks on each end wall | Jayco says a professional retracts it |
| Hydraulic | Ram arms plus a pump with a see-through reservoir | Run the pump with a hand-held drill |
| Cable (Norco or BAL) | Bowed interior fascia, or cables on the end walls | Turn the motor override shaft with the supplied flex shaft |
Identification from Jayco's 2027 towable owner's manual, retract methods from each system's own manual.
On a through-frame electric slide, confirm the transit bars are off and the slide tubes are free of ice or mud. If the motor runs but the room does not, the actuator may not be attached to the front drive bracket. On a hydraulic slide, check the fluid.
Tip: Check and fill hydraulic fluid (automatic transmission fluid) only with the slides and jacks fully retracted, or the reservoir overflows when the rooms come in. Keystone says to keep it within 1/2 inch of the top.
Getting it in right now
Use only the override for your slide type. Disconnect the battery first, except for the in-wall and hydraulic methods, which use the controller or the pump; the room and mechanism are a crush hazard.
In-wall (Schwintek):
- Find the slide controller.
- Unplug the motor 1 and motor 2 connectors from the circuit board to release both motor brakes.
- Push or pull the room in, keeping both sides even. Larger rooms need two or more people.
- Plug both motors back in to apply the brakes for road travel.
- Fit the transit bars or travel lock. Do not move the RV unless the motors are plugged in.
Through frame, rack and pinion:
- Disconnect the battery. Backfeed through the motor can seriously damage the system and void the warranty.
- Find the hex crank extension on the main rail or atop the actuator. On a Jayco it is a 3/4 inch nut on the frame rail, opposite the slide.
- Turn it with a 3/4 inch socket and ratchet or a landing gear crank. Lippert says clockwise to retract, Forest River counterclockwise, so follow your own label.
- Stop at full travel, or the gears can strip; override damage voids the warranty.
Power Gear's electric slide has a brake lever instead: rotate it about 30 degrees counterclockwise to release, then back to Engaged or the room will not lock or seal.
Hydraulic:
- Find the coupler on the pump, under the protective label.
- Put a hex bit in a cordless or electric drill and insert it in the coupler.
- Run the drill in the direction your label gives: Lippert's 2019 hydraulic owner's manual and its component manual give opposite directions.
- A standard 38 inch room takes about 45 seconds to retract.
On a cable slide, turn each motor's override shaft with the supplied flex shaft and a cordless drill, not an impact driver, alternating motors so the room does not wedge. Then travel-lock it and check the seals and wear bars before you drive.
Why is it going in crooked?
On an in-wall slide, a crooked room means the two motors are out of sync, which is normal after an electronic override. To resync:
- Fully extend, holding the switch until the motors stop on their own.
- Retract 1 to 2 inches, then extend again. Repeat until both motors shut down at the same moment, often two or three rounds.
- Run one full extend and one full retract.
If one side goes in while the other goes out, that is a wiring problem. A room still crooked after a resync goes to the dealer: room adjustments are for certified technicians.
Tip: Do not grease a sticky room. Lippert says in-wall gear racks need no grease and it may be detrimental, and Keystone says no petroleum grease on the slide system.
Where to stop
Hand these to a qualified RV technician: a hydraulic leak, a breaker that blows again on replacement, a broken motor shaft, stripped gears or a wiring fault behind the controller. Hydraulic oil may be under high pressure and can cause serious skin-penetrating injuries, so keep hands and body clear.
A room that stalls before the end of its stroke or will not close and seal tightly is Grand Design's stated dealer line. If you must be under the room, disconnect the battery and support the coach on jack stands at both axles.
Common questions
How do I manually retract an RV slide-out?
Identify the mechanism first, because each type has its own override. Read the label on your override point before turning anything, since published rotation directions conflict.
Why does my RV slide-out go in crooked?
Usually the in-wall motors have lost sync, and the synchronizing procedure above fixes it. Debris in a gear rack can also hold one side back, so clear the racks before you resync.
Can a weak battery stop the slide-out?
Yes, even on shore power. On a SlimRack system the controller flags low voltage below 12 V DC, and the room will not move at 10.5 V DC or below.
Why is my slide-out floor separating from the wall?
That is structural, so book an RV technician rather than moving the room. Keystone notes a retracted slide-out floor is not supported by the main floor, and stepping on it can damage the room.