Pressure washer electrodes are a critical component of the machine's ignition system within the boiler. They create the spark that ignites the fuel and air mixture in the boiler, providing the heat/flame to operate the pressure washer at high heat. Keeping the electrodes clean and in good condition is essential to ensure the machine starts quickly and runs smoothly. If you notice any signs of wear or corrosion on the electrodes, it's best to replace them immediately to avoid any potential issues.