LawnMaster Rain Sensor Miscalibration

Robot mower's rain sensor triggers too easily or not at all, causing mowing at inappropriate times.

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Possible Causes

Incorrect sensitivity setting, Contamination on sensor surface, Sensor mounted at wrong angle, Aging rain sensor element

How to Fix / Troubleshooting

Safety first: Turn OFF the mower or unplug the charging station before adjusting the rain sensor.

  • Clean sensor: Wipe the rain sensor with a soft cloth to remove dirt and algae.
  • Adjust sensitivity: Use the LawnMaster menu or app to fine-tune rain sensor sensitivity according to your climate.
  • Check mounting: Ensure the sensor is level and exposed to open sky, not under eaves or dense foliage.
  • Test with water: Simulate rain by dripping water on the sensor and observing mower response.

If the sensor remains overly sensitive or unresponsive, replace the LawnMaster rain sensor module.

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Repair Difficulty

Easy 2/5

Required Part

Rain Sensor Module
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