Yard Force
Blade Drive Failure
Robot mower runs but does not cut grass; blades are not spinning though the mower moves around.
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Safety Warning
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.
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Possible Causes
Disconnected blade motor plug, Failed blade motor, Seized blade disc, Main PCB not commanding blade due to sensor fault
How to Fix / Troubleshooting
Safety first: Turn OFF the mower and disconnect the battery. Never test blade operation with the mower upside down.
Steps:
- 1. Check for jams: Turn the mower over and ensure the blade disc spins freely by hand.
- 2. Inspect motor wiring: Open the housing and verify the blade motor connector is firmly attached to the main PCB.
- 3. Functional test: With the mower upright on a flat surface and blades enabled, listen for the blade motor starting. If silent, suspect motor or PCB.
- 4. Measure motor: Disconnect the motor and measure its resistance. An open or very low reading indicates a faulty motor.
- 5. Replace blade motor: Install a new Yard Force blade motor assembly if defective.
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Repair Difficulty
Hard
4/5
Required Part
Blade Motor Assembly
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