Robot mower shows E12 and stops; often in very hot or very cold weather.

Safety first: Turn OFF the mower and allow it to cool or warm to normal ambient temperature.

• Move to shade: If the mower or charging station is in direct midday sun, relocate the station to a shaded area and schedule mowing for cooler times.
• Check vents: Inspect any ventilation slots for blockage by grass, dust, or spider webs. Clean gently with a soft brush.
• Battery temperature: If the mower becomes very warm during charging, allow it to rest and ensure the station is not enclosed in a small, unventilated space.
• Restart: After the mower has returned to a moderate temperature, switch ON and resume operation.
• Sensor fault: If E12 appears even at normal temperatures, the internal temperature sensor or PCB may be faulty and require professional replacement.