Patent ID: 8074668

Claim:
An electrical pressure washer comprising: a housing including a water inlet port and a water outlet port; the housing containing an electrical motor that is adapted to pressurize water received through the water inlet port and to output pressurized water through the water outlet port; an application wand connected to the water outlet by a hose and having a nozzle for outputting the pressurized water; the housing further including a diagnostic circuit and an indication panel; a power cord connected to the electrical motor for delivering AC power to the electrical motor and having a plug at a distal end; wherein the diagnostic circuit includes a plurality of operational amplifiers, each operational amplifier determining the presence of a different operation condition of the pressure washer based on a comparison between a detected voltage drop over a return wire of the power cord and a corresponding reference voltage; wherein the indication panel comprises a plurality of indicator lights that are connected to the diagnostic circuit, with each indicator light each corresponding to said different operation condition and being adapted to be illuminated when the diagnostic circuit has determined that the respective operation condition is present.