Pressure washers, also called power washers, are portable devices that dispense pressurized water through a nozzle, removing dirt from the surface of objects. Pressure washers are manufactured in two basic types: gas-powered and electric-powered. Troubleshooting an electric pressure washer that will not start involves checking a variety of electrical components to diagnose which one is failing to supply power.
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Press in on the power cord firmly to make sure that it is not slightly dislodged from the electrical outlet.
Remove the power cord from the electrical socket and insert it into another socket. If the pressure washer turns on, you know that the problem is with the previous electrical socket and not with the pressure washer.
Move the pressure washer's cord to an electrical outlet that does not have any other major appliances plugged into it. Major appliances draw large amounts of energy from the circuit, meaning that there may not be enough left to power the pressure washer.
Read the fine print on the extension cord to verify that you are using the correct type. If the extension cord is longer than 25 feet, it must be a 12-gauge wire cord. The cord gauge is written on the tag attached to the cord, usually near the plug. Lighter-gauge extension cords do not provide adequate power to the pressure washer.