Pressure Washer Thermal Relief Valve Stuck

The new pressure washing technology gave jack s crew a clear advantage and they quickly became known for delivering higher quality work in a lot less time than their competition.

Pressure washer thermal relief valve stuck.

If your pressure washer is not building pressure and the engine is surging there could be a few different causes. This just means that a thermal relief valve has been installed on your pump to prevent over heating. If the pressure washer doesn t develop adequate outlet pressure the unloader valve could be stuck open. If the valve sticks in the closed position the thermal relief valve frequently discharges hot water onto the ground because the unloader valve can t open to allow recirculation.

Dirt caught in the spring or a stuck shaft are the most common issues solved by simply removing the unloader and cleaning looking for issues. As the co owner of an industrial cleaning and painting company jack simpson created the first simpson pressure washer in 1961. The water is trapped in a loop which means fresh cool water cannot come in. If the pressure washer doesn t develop adequate outlet pressure the unloader valve could be stuck open.

The thermal relief valve is usually preset to discharge water when it reaches 195 degrees. If the pressure washer doesn t develop adequate outlet pressure the unloader valve could be stuck open. If the unloader valve sticks shut outlet water pressure builds up until you trigger the spray wand or the pressure relief valve trips to release excess pressure. Thermal relief valves are a must have for pressure washers when the water is supplied by a garden type water hose.

A defective pressure regulator can cause high pressure at the nozzle. One of them is a sticking unloader valve.