Lippert Leveling System: “Comm Error”
warning RV leveling system error codes
What it means
Communication between the touchpad and the control module has been lost. The touchpad cannot talk to the controller, so the system will not operate until the link is restored.
Most likely causes
- Loose, unseated, or disconnected communication harness connector at the touchpad or controller most likely
- Damaged, corroded, or pinched communication harness common
- Low or dead battery / insufficient supply voltage to the controller common
- Failed control module or touchpad less common
Safe checks you can do yourself
- Re-seat the connector on the back of the touchpad and at the control module.
- Inspect the communication harness for frayed, pinched, or corroded wires.
- Check that the house battery reads about 12.6V or more and is healthy under load.
- Verify controller power and ground connections are clean and tight.
How to reset / clear Comm Error
- On Ground Control 3.0, press and hold the Retract and Enter buttons together for about 3 seconds to clear the code.
- If that fails, disconnect system power for several minutes, then reconnect and retry.
- On Level-Up, replace the communication harness if connections are confirmed loose or faulty.
When to call a technician
Connectors and harness are confirmed good and the battery is healthy but the Comm Error persists, indicating a failed control module or touchpad that needs replacement.
Applies to
Ground Control 3.0 (5th wheel / travel trailer electric) · Level-Up (hydraulic) · Electronic/Hydraulic Leveling with touchpad
FAQ
What does Lippert Leveling System code "Comm Error" mean?
Communication between the touchpad and the control module has been lost. The touchpad cannot talk to the controller, so the system will not operate until the link is restored.
How do I reset Lippert Leveling System Comm Error?
On Ground Control 3.0, press and hold the Retract and Enter buttons together for about 3 seconds to clear the code. If that fails, disconnect system power for several minutes, then reconnect and retry. On Level-Up, replace the communication harness if connections are confirmed loose or faulty.
What is the most common cause of Comm Error on a Lippert Leveling System?
The most likely cause is loose, unseated, or disconnected communication harness connector at the touchpad or controller.
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Sources
- Lippert Level-Up Owner's Manual (Comm Error / Check Wiring) — Level-Up Owner's Manual, Error Modes (Comm Error / Check Wiring) (Lippert Components / ManualsLib)
- Troubleshooting Comm Error on Lippert Ground Control 3.0 Auto Leveling System — etrailer expert Q&A citing Lippert Ground Control 3.0 documentation (etrailer.com)
- Clearing Fault Code and Manually Operating Lippert Ground Control 3.0 — etrailer expert Q&A (Retract + Enter reset procedure) (etrailer.com)
Note: Reset key combination (Retract + Enter, ~3 sec) is documented for Ground Control 3.0; Level-Up clears differently. Confirm the exact reset for your specific touchpad model in your owner's manual.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.