When your high pressure washer loses power, surges, or starts leaking, you don’t need guesswork—you need a method. You’ll look at water supply, pump, valves, seals, and pressure controls in a clear order, ruling out simple issues like clogged filters and kinked hoses before touching the pump. Once you see how each symptom points to a specific fault, you’ll know exactly where to start—and what to avoid doing next.