There could be many reasons for your electric pressure washer's breaker to trip. One possibility is that the discharge hose is kinked or crimped, preventing the water from leaving the pump/motor and reaching the nozzle. If this is causing the breaker to trip, it can usually be corrected by pulling out the discharge hose and re-kinking or unscrewing and fixing the hose's fitting. Another possibility is that there may be something in the pump canal blocking wash water from entering or exiting the pump. This can often be fixed by clearing obstruction from pump canal with a plunger or using a pipe cleaner dipped in hot water to clear debris.