Pressure Washer Thermal Relief Valve Stuck

Thermal relief valves are a must have for pressure washers when the water is supplied by a garden type water hose. If your pressure washer is not building pressure and the engine is surging there could be a few different causes. If the pressure washer doesn t develop adequate outlet pressure the unloader valve could be stuck open.

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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.

Pressure washer thermal relief valve stuck.

Wait 5 minutes before using. Until you pull the trigger your pressure washer is in by. 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. If the pressure washer doesn t develop adequate outlet pressure the unloader valve could be stuck open.

Thermal relief valves excessive heat. Seeing water spewing out of your pressure washer can be a distressing sight. The thermal relief valve is usually preset to discharge water when it reaches 195 degrees. One of them is a sticking unloader valve.

Thermal relief valves are a must have for pressure washers when the water is supplied by a garden type water hose. 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. When the operator releases the trigger the pump s unloader diverts the water back to the inlet side of the pump. This just means that a thermal relief valve has been installed on your pump to prevent over heating.

This is referred to as a closed loop by pass.