Robot Mower Won’t Charge or Return to Its Base? Fixes

What is going wrong

• 1Station powerConfirm the base has power before drawing any conclusion about the machine.
• 2Both sets of contactsA mower's contacts live outdoors. Oxide builds on them in a way a vacuum's never do, and it stops the charge without stopping the docking.
• 3The approachThe machine lines up on the guide signal over the last few feet, so anything narrowing that run causes a miss rather than a bump.

The usual causes

• Dirty or corroded charging contacts. The metal strips on the mower and the dock build up oxidation, grass film, and moisture residue. Poor contact means the mower parks but never draws a charge.
• No power at the dock. A tripped outlet, a cut or chewed low-voltage cable, or an unplugged power supply leaves the base dead even though the mower docks correctly.
• Docking station placement. A dock on a slope, on uneven ground, or too close to a wall or corner can stop the mower from aligning its contacts.
• Lost return path. Boundary-wire mowers follow the perimeter wire or a guide wire back to the dock; wire-free RTK mowers navigate by satellite position. A break, a signal drop, or a poor return location blocks the trip home.
• Depleted or aging battery. A battery near the end of its service life may report a charge it cannot hold, so the mower leaves the dock and stalls quickly.

Fixes to try in order

1. 1

   Clean both sets of contacts.

   Power down the mower, then wipe the charging strips on the mower and the dock with a dry cloth or fine abrasive pad until the metal is bright. Remove any grass or debris packed around them.

2. 2

   Confirm the dock has power.

   Check the outlet with another device, inspect the full length of the low-voltage cable for cuts or rodent damage, and verify the power supply indicator light if the model has one.

3. 3

   Reseat the mower by hand.

   Place it on the dock manually and watch whether the charge indicator responds. If it charges when placed by hand but not on its own, the problem is the return path or alignment, not the charger.

4. 4

   Check the docking approach.

   Make sure the dock sits on firm, level ground with clear space in front of it. Clear grass clippings, sticks, and standing water from the approach lane.

5. 5

   Test the boundary and guide signal.

   For wire-based systems, confirm the base station signal light is steady and walk the perimeter for visible wire breaks. For RTK systems, confirm the reference antenna has a clear sky view and a stable satellite fix before the return trip.