RV leveling jacks will not retract, or the panel keeps faulting

A leveling system that faults with the jacks down is the RV failure that keeps you parked. You cannot safely drive with jacks extended, and in Sebring that call usually comes at the worst moment: the morning you are due to pull out of a resort site, or the first move of the season after the rig sat through a Florida summer. Most of these end at low voltage, a loose connection or a fuse, which is the $75 to $150 trip fee and the first hour of labor at $125 to $190. A failed jack motor, a damaged harness or a dead controller is quoted in writing after the test, and a control module runs $300 to $800.

If you need to move today

Plug in to shore power and wait. Give the converter fifteen to thirty minutes to bring the battery bank up before you touch the panel again. Pressing retract over and over on a weak bank is what produces the reboot loop.
Try Retract All once. On Lippert systems with the newer controller, Lippert’s manual says most standard faults clear by pressing Retract All on the leveling touch pad, and a jack fault clears by holding Retract All until the jacks start moving.
Use the manual override if it still will not go. Electric Lippert jacks have an override port on each motor (3/8 inch drive ratchet on top, 5/16 inch socket underneath). Pull the rubber plug, turn until the jack is fully up, and do the corners evenly.
Check every jack before rolling. A jack that is an inch down drags, bends and catches. Walk around the rig and look.

If checkout is today and a jack will not come up, call the park office before anyone tries to drag the rig off the site. A jack that is still down when the rig moves bends the leg and can tear the mount out of the frame.

What the panel is telling you

These come straight from Lippert’s Ground Control 3.0 owner’s manual, one of the fifth wheel systems run from a OneControl screen. Other Lippert systems use the same messages or close variants.

Message on the panel	What is happening	What fixes it
LOW VOLTAGE	Discharged or bad battery, or a bad connection	Charge, load test the bank, then check the wiring
AUTO LEVEL FAIL	Voltage drop, or the controller came loose	Same as low voltage, then secure the controller
Panel reboots when a motor starts	Voltage collapsing under load (not on Lippert’s list, but the usual cause)	Battery bank, ground and main connections
Left-Front / Right-Rear (any corner) Jack Fault	Open or short between the controller and that jack, or a blown fuse	Harness at both ends, fuses at the controller
EXCESS ANGLE or OUT OF STROKE	Site too sloped for the jacks, or controller loose	Move the rig or block under the low side
JACK TIME OUT	Could not level in the time it expected	Look at the jacks: one may be sinking or bound
BAD CALIBRATION	The level zero point was never set or was lost	Reset the zero point from the touch panel
HALL POWER SHORT	Short on a jack sensor power line	Harness repair; cannot be cleared from the touch pad

Lippert notes that HALL POWER SHORT, BAD CALIBRATION and EXTERNAL SENSOR can only be cleared from the OneControl touch panel or app, not from the small leveling touch pad by the door.

Why it happens here, and when

The fall arrival. A rig that sat in storage from spring to fall comes out with a battery bank that was either cooked by a converter with no float mode or left to sulfate flat. Leveling jacks are the first big load it sees. The dead batteries page covers that bank, and a new bank installed in a parking lot on the way down brings its own trouble: a loose ground or a disconnect left off kills the leveling panel first.

The soft site. A grass or sand site can let a jack foot settle after a summer downpour. One jack sinking makes the controller chase level until it times out. Pads or blocks under each foot spread the load, and a jack that has sunk should be checked for a bent leg before it is retracted under power.

Lightning. A surge through a park’s pedestal loop takes out converters first and leveling controllers sometimes. If the leveling panel died the same night the converter did, test both; the lightning damage page lists what else usually goes with it.

What the repair involves

We meter voltage at the leveling controller with a jack motor running, not just at the battery, because a corroded connection between the two looks perfect on a meter at rest and drops out the moment the motor pulls. Then the fuses at the controller, the harness to any jack that faulted, and the motor itself on the bench or in place. A jack that ran into a hard stop or a bent leg gets inspected before it is cycled again. Once the fault is fixed we home the jacks with an Auto Retract, which is what clears a jack fault for good, and reset the zero point if the calibration was lost.

When to call

Today, if the jacks are down and you need to leave; the manual override above is the stopgap if you can reach the motors. Before you travel, if the panel has been flickering, restarting or throwing low voltage, because that is the warning before it strands you.

Tell us the rig, the leveling system if you know it (Lippert Ground Control, Level Up, or a hydraulic system), the exact message on the panel and whether any jack is still down. We work on site at the resorts around Sebring, Lake Placid, Avon Park and out to Okeechobee. Slides that will not move are a separate system with their own checks on the slide-out page.

Frequently Asked Questions

My OneControl panel keeps rebooting every time I try to level or retract. What is wrong?

Most often it is voltage. Jack motors pull far more current than anything else on the coach, and a tired battery bank, a loose ground or a corroded connector lets the voltage sag the instant a motor starts. The panel and the leveling controller brown out, restart, and the cycle repeats. Plug in to shore power, let the converter charge the bank, then try once. If it still restarts, the wiring between the battery and the controller is the next suspect, not the panel itself.

Can I retract the jacks by hand so I can move the RV?

On Lippert electric jacks, yes. Lippert's Ground Control 3.0 manual shows an override port on each jack motor: on top, a 3/8 inch drive ratchet goes straight into the port with no socket; on the bottom, a 5/16 inch socket on the ratchet. Pull the rubber plug and turn until the jack is up. Front landing gear on a fifth wheel has quick release pins for the inner leg. Retract slowly and evenly so the frame is not twisted, and make sure every jack is fully up before the rig rolls.

What does LOW VOLTAGE or AUTO LEVEL FAIL mean on the panel?

Lippert lists the same causes for both: a bad connection or wiring, or a discharged or bad battery, and for AUTO LEVEL FAIL also an unsecured controller. Their fix is to check the wiring and test the battery under load. A battery that reads 12.6 volts at rest can still collapse under a jack motor, which is why the test has to be under load.

What does a jack fault on one corner mean?

A Left-Front, Right-Rear or other single-jack fault means the controller lost contact with that jack: an open or short circuit between the controller and that motor, or a blown fuse at the controller. Lippert's fix is to check the harness at both ends and the fuses. Once repaired, the fault clears after a successful Auto Retract.