How do I troubleshoot if the motor buzzes but fails to run?
Verify that only the pressure washer is running on this circuit. Turn off the unit, squeeze trigger on spray wand to release pressure, then turn the unit back on. Disconnect water supply and power on for 2-3 seconds a few times or until the motor starts (Page 27).
From the official Greenworks 2000 Psi Pressure Washer manual, page 27
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