Pressure Washer Thermal Relief Valve Stuck

Until you pull the trigger your pressure washer is in by pass mode.

Pressure washer thermal relief valve stuck.

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 pressure washer doesn t develop adequate outlet pressure the unloader valve could be stuck open. 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. The water is trapped in a loop which means fresh cool water cannot come in. As the co owner of an industrial cleaning and painting company jack simpson created the first simpson pressure washer in 1961. 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.

If your pressure washer is not building pressure and the engine is surging there could be a few different causes. 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. 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.

Wait 5 minutes before using. Thermal relief valves are a must have for pressure washers when the water is supplied by a garden type water hose.