Display shows “Collision sensor problem” and mower may stop frequently or not detect obstacles correctly.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Stuck front bumper, Broken bumper springs, Dirt or grass jammed behind bumper, Faulty collision sensor switch or board

Safety first: Turn OFF the mower and place it on a stable surface.

Check bumper movement: Press the front bumper in and release. It should move freely and return smoothly.
Clean behind bumper: Remove grass, mud, and debris from the bumper mechanism and springs.
Inspect springs and mounts: Replace any broken or missing springs or plastic mounts.
Sensor check: Open the mower and verify the collision sensor switch or board is firmly attached and wired.
Test run: After cleaning and reassembly, run the mower and observe obstacle detection.

Medium 3/5

Collision Sensor / Bumper Assembly

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