ServiceNomad RV · Knowledge
Lippert Leveling System Error 29
Error 29 on Lippert leveling systems is one of the more frustrating codes because it often appears without an obvious cause. This error indicates the system has detected an abnormal condition during the leveling cycle—typically related to hydraulic pressure loss, jack binding, or sensor miscalibration. Understanding what Error 29 means helps you troubleshoot basic issues before calling a mobile technician for hydraulic diagnostics.
What Error 29 Indicates
The Lippert control system monitors each leveling jack's movement through position sensors (usually hall-effect or potentiometer-based). Error 29 appears when the system commands a jack to extend or retract, but the sensor feedback doesn't match the expected movement within a set timeout period. In simpler terms: the system told a jack to move, the jack didn't move as expected, and the system stopped to prevent damage. This could mean the jack is physically binding against something, the hydraulic pressure is too low to move the jack under load, or the sensor has lost calibration and is reporting incorrect position data. Error 29 is protective—it prevents the system from continuing an operation that might damage the jacks, frame, or hydraulic pump.
Hydraulic Pressure and Fluid Level
Lippert leveling systems rely on hydraulic fluid under pressure to extend and retract the jacks. If the hydraulic reservoir is low on fluid (due to a leak or air in the lines), the pump cannot generate sufficient pressure to move the jacks smoothly. The control system detects sluggish or incomplete movement and throws Error 29. A technician will check the hydraulic fluid reservoir (usually accessible near the pump assembly) and look for visible leaks around jack cylinders, hydraulic lines, and fittings. If fluid is low, they will top it off and bleed air from the system. If a leak is present, the source must be repaired before refilling—hydraulic fluid is expensive and a mess to clean up.
Jack Binding and Obstructions
If one or more jacks are binding—whether from a bent cylinder, debris lodged in the jack tube, or misalignment from a previous leveling error—the system will struggle to move that jack and throw Error 29. This is especially common if you've leveled on extremely uneven ground where one jack had to extend much further than the others, putting side-load stress on the cylinder. A technician will manually inspect each jack for visible damage, ensure the jack feet are clear of debris, and check that the jack tubes are straight and not pinching the cylinders. In some cases, the jacks need to be manually retracted (using the manual release valves) and re-calibrated.
Sensor Calibration and Recalibration
Lippert systems require periodic recalibration to ensure the position sensors accurately reflect the actual jack extension. Over time, vibration and thermal expansion can cause sensor drift, leading to false Error 29 alarms. The recalibration process involves extending all jacks to their maximum safe extension, then using the touchpad to perform a 'store home' or 'calibration' procedure (specific steps vary by model). If you've recently had bodywork done, replaced a jack, or experienced a major leveling failure, recalibration is essential. The control system needs to relearn the full travel range of each jack to function properly.
⚠️ Safety Notes
- Never manually move or force a leveling jack when the system is showing an error—you risk damaging the hydraulic cylinder or control valves.
- Ensure no one is inside the RV when performing leveling diagnostics, as unexpected movement can occur.
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