Robot lawnmower does not respond to the stop button immediately; there is a noticeable delay before it stops.

Safety first: If the stop button is unreliable, discontinue use until repaired. Turn OFF the mower and remove the battery before servicing.

• Clean button: Use compressed air and a soft brush to remove dirt from around the NAC stop button.
• Check mechanical action: Press the button repeatedly and ensure it moves freely and returns properly.
• Inspect switch: Open the top cover and examine the stop switch assembly. Look for corrosion or moisture. Replace if contacts appear burnt or green.
• Test response: After reassembly, power ON and verify that pressing STOP halts the mower instantly. If delay persists, the main board safety circuit may be compromised and should be replaced by a professional.

Warning: A delayed stop is a serious safety hazard. Do not operate the mower until the stop function is fully reliable.