Robot mower shows E016 and stops; may mention rain or weather sensor.

Safety first: Turn OFF the mower before inspecting the rain sensor.

• Locate rain sensor: On some Greenworks models, the rain sensor is on the top cover as a small grid or pad.
• Clean sensor area: Wipe gently with a dry cloth to remove dirt, pollen, or residue.
• Dry thoroughly: If the mower has been in rain, move it under cover and allow it to dry completely.
• Check settings: In the mower menu or app, verify that the rain sensor function is configured correctly.
• Restart: Power ON and see if E016 clears after drying.

If the mower always reports rain or E016 even when dry, the rain sensor or main board input may be defective.