Robot Lawn Mower Won't Return to Its Dock: Causes and Fixes

First, Know Your Navigation Type

How a mower finds its dock depends on its technology, and so does the fix. RTK/GPS mowers (most Navimow, GOAT, and similar wire-free models) navigate home by satellite positioning relative to a base antenna. Wire-guided mowers (like many Worx Landroid units) follow a buried boundary or guide wire back to the dock. The causes below are grouped so you can jump to the ones that apply to your mower.

2. RTK/GPS: Weak or Lost Satellite Signal

Wire-free mowers need a clear satellite fix to navigate, including for the trip home. If the RTK signal is weak — heavy tree canopy, new structures, or a base antenna with an obstructed sky view — the mower loses confidence in its position and can wander or stop instead of docking. Fixes: confirm the RTK reference station/antenna has a clear view of the sky and hasn't shifted, check the app for satellite/signal status and error messages, and use the vision/LiDAR backup if your model has one. After moving or re-siting the antenna, you may need to re-map.

3. RTK Antenna or Dock Moved / Re-Mapped Needed

RTK navigation is referenced to the exact position of the base antenna and dock. If either was bumped, relocated, or reinstalled even slightly differently — over winter storage, for instance — the mower's whole map is offset and the dock isn't where the mower thinks it is. Fix: restore the antenna and dock to their precise original positions, or re-run the setup/mapping so the mower learns the new reference. Many 'suddenly won't dock after I moved something' cases are exactly this.

4. Wire-Guided: Broken Boundary or Guide Wire

For wire-based mowers, a broken boundary wire is the classic cause — the mower can't find the perimeter or the guide wire that leads to the dock, and usually reports a wire/loop error. Breaks come from aeration, edging, frost heave, or rodents. Check the dock/base unit's wire-status light, then walk the perimeter for damage (a wire-break detector helps). Repair the break with a proper waterproof connector. Also confirm the guide wire (the separate wire some systems use to lead the mower home) is intact and connected.

5. Dirty or Misaligned Charging Contacts

Sometimes the mower reaches the dock but doesn't charge or seat — and then reports a docking failure. The charging contacts on the dock and mower oxidize, corrode, or get coated in grass and sap, breaking the connection. Clean both sets of contacts with a dry cloth or fine abrasive (gently), and check they line up and spring properly when the mower docks. Bent or burnt contacts may need replacement. A mower that bumps the dock and backs off repeatedly often has a contact alignment or cleanliness issue.

6. Poor Dock Placement and Approach

Docks need a clear, level, straight approach. If the dock sits on a slope, on uneven ground, around a tight corner, or where grass and debris pile up, the mower struggles to align and seat. Per most manuals, the dock should be on flat ground with a straight run-in of a metre or more, away from sprinklers and standing water. Reposition the dock to give the mower a clean final approach, and keep the area around it trimmed and clear.

7. Obstacles, Low Battery, and Getting Stuck En Route

The mower may be trying to dock but getting blocked or stranded on the way: a new obstacle across its return path, a patch it gets stuck in, or a battery so depleted it stops before reaching home. Walk the likely return route for obstructions (toys, hoses, fallen branches, soft muddy patches), clear them, and check the app for a 'stuck' or 'lifted' error. If the battery routinely dies before docking, the work area may be too large for one charge or the return is being triggered too late — adjust the schedule or zones. Also confirm the mower isn't simply parked by a rain/schedule setting that you've mistaken for a docking fault.

Frequently Asked Questions