Why is my Automower® making a buzzing sound?
If your Automower® robotic lawn mower makes a buzzing, humming or vibrating noise during mowing, it’s usually a sign of imbalance in the cutting system.
These are the most common causes and how to resolve them:
1. Two blades attached to one screw
Issue:
Attaching two blades to the same screw creates an imbalance in the cutting disc, resulting in excessive vibration and a buzzing or bee-like sound.
Solution:
- Check each screw to ensure that only one blade is attached.
- Remove any extra blades.
2. Dull, chipped or mismatched blades
Issue:
Worn-out or broken blades can create vibrations and an uneven cutting result. Mixing old and new blades or using different blade types can also lead to imbalance.
Solution:
- Replace all three blades at the same time.
- Always use new screws when replacing blades.
- Avoid mixing blade types (e.g. different shapes or weights).
- Inspect blades regularly and replace them if damaged.
How and when to change the cutting blades on your Automower® robotic lawn mower
3. Tall or dense grass
Issue:
Cutting overgrown grass puts more strain on the motor and blades, often causing a humming or buzzing sound during operation.
Solution:
- Adjust the cutting height to a higher setting and reduce it gradually over time.
- Mow regularly to keep the lawn within the recommended height range for your Automower® model.
If the problem persists after trying the above solutions, please contact your local Husqvarna dealer.
