There is a particular kind of confusion that comes from a robot mower that charges perfectly, shows a happy green light, and then simply sits on its dock all day. Nothing looks wrong. It is fully powered, connected to the app, and still refuses to mow. I have watched neighbors assume theirs was broken when the real answer was a schedule that never told it to run. A parked mower is a communication problem more often than a mechanical one. Below is the order I check things in, moving from the simplest setting to the physical faults, so you find the reason without tearing anything apart.
Check the Schedule and Run Settings First
The most common reason a healthy mower stays home is that nothing told it to leave. Open the app and look at the schedule. A blank calendar, a paused state, a holiday or eco mode, or an away setting will all keep it docked while everything else reads normal. Confirm the current day and time are inside a scheduled mowing window and that the clock on the mower is correct, since a wrong time zone can push every window into the night. Try a manual start from the app or the button on the body. If it rolls out on a manual command, your fix lives entirely in the schedule.
For the bigger picture, our main guide Robot Mower Troubleshooting: Fix Common Problems sets the scene.
Confirm the Boundary Wire Signal
Boundary-wire models will not leave the dock if they cannot sense a live perimeter loop. A single break, a loose connector at the base, or an unplugged wire end silences the whole loop, and the mower usually shows a wire or loop error rather than moving. Check that both wire ends are firmly seated in the charging station and that the base shows its signal light if it has one. A break often hides where a spade, aerator, or frost heave disturbed the lawn. If the perimeter signal is dead, the mower is doing exactly what it should by staying put until the loop is whole again.
Look for GPS and Mapping Problems
Wire-free GPS and RTK models refuse to start when they cannot place themselves on the map. If the reference antenna or base station has been bumped, tilted, or moved even slightly, the mower may not trust its position enough to leave. Heavy tree cover, a tall wall, or a cloudy antenna window can weaken the signal below the threshold it needs. Check the app for a positioning or signal warning, confirm the antenna has a clear sky view, and make sure the mower still recognizes its saved map. Re-establishing a strong fix, or nudging the antenna back to its original spot, often gets it rolling again.
Inspect Sensors and the Underside
Safety sensors are designed to stop the blades and the drive, so a stuck or dirty sensor can read as a permanent hazard and keep the mower parked. Caked mud on the underside can trick a lift or tilt sensor into thinking the machine is being carried. A bump sensor pressed by a stone or a twig lodged in a wheel reads as a constant collision. Power the mower off and wipe the underside, the sensor windows, and around the wheels. Spin the blade disc by hand to confirm nothing is jammed. Clearing these physical blocks resolves a surprising share of mowers that stay stubbornly docked.
Why a Mower Stays Docked, and What to Try
- Blank or paused schedule: add an active mowing window
- Wrong clock or time zone: correct the mower's time
- Eco, away, or holiday mode active: switch it off
- Manual start ignored: check the button and app link
- Broken boundary loop: reseat wire ends and find the cut
- Weak GPS or RTK fix: clear the antenna's sky view
- Antenna or base moved: return it to its original spot
- Muddy lift or tilt sensor: wipe the underside clean
- Stone on a bump sensor: clear debris around the body
- Twig jamming a wheel or blade: remove it by hand
- Rain or cold hold active: wait for a dry, warmer window
- Stale firmware or lost pairing: update and re-pair
We break down the next step in Robot Mower Stops in the Middle of Mowing.
Rule Out Rain, Cold, and Battery State
Sometimes the mower is behaving exactly as designed. A rain sensor will hold it on the dock during a drizzle, and many owners mistake that pause for a fault. Cold weather can also keep it home, since some models will not start until the battery and air temperature rise above a safe threshold in early spring. Confirm the pack is actually full, because a mower that reports charging but never reaches complete may keep waiting to top off. Check the app for a weather or temperature hold. If the sky is grey and the ground is wet, giving it a dry, warmer window may be the entire solution.
If you like to read around a topic, see lithium-ion battery basics.
Restart, Update, and Re-Pair
When settings, wiring, sensors, and weather all look right, treat the software. Power the mower fully off, wait a minute, and restart it, then send a manual start. Install any pending firmware update, since scheduling and start logic live in software that occasionally needs a patch. If the app has lost its link to the mower, re-pair or reconnect it so your commands actually reach the machine. Keep your model number and warranty details handy. If it still refuses after a clean restart and every check above, contact the seller or an authorized service center rather than forcing it, and follow your model's manual throughout.
The takeaway
A mower that will not leave its base is rarely the broken machine it appears to be. Far more often it is waiting on a schedule you forgot to set, a wire it cannot feel, a signal it cannot find, or weather it was built to avoid. Start with the schedule and a manual start, since that one test tells you whether you are chasing a setting or a fault. Then work outward through the wiring, sensors, and weather. Handle it in that order and most owners have their mower back on the grass within an afternoon, quietly trimming as if nothing ever went wrong.
If you want to go deeper, our guide to Why Your Robot Mower Gets Lost and How to Fix It covers the details.
