Why does the motor buzz and fail to run? Cause Solution Supply voltage below minimum. Allow only the pressure washer to run on this circuit. System has residual pressure. Turn unit "OFF", squeeze trigger on spray wand to release pressure, then turn unit "ON.". Voltage loss due to extension cord. Unplug any extension cords attached, and plug the unit directly into the outlet. If the issue persist after performing the said troubleshooting steps, kindly contact our Customer Support Team at +1 (866) 766-9563 to further assist you. Related articles Why is my unit not reaching high pressure? Buy with Prime - Return Policy Pressure Washer Why is my SPX-FC34 not dispensing detergent? Can I use disinfectants as detergent with my SPX7001E pressure washer?