Pressure Washer Relief Valve Not Working

This just means that a thermal relief valve has been installed on your pump to prevent over heating.

Pressure washer relief valve not working.

Until you pull the trigger your pressure washer is in by. The two serve the same purpose but function differently. The unloader valve is not the correct way to change the pressure output of your machine. An unloader valve has a mechanism in place to trap pressure between itself and the nozzle which relieves the pump of withstanding any back pressure created when the trigger wand is.

The thermal relief valve is usually preset to discharge water when it reaches 195 degrees. How does the unloader valve work. After watching this video you may be able to get your pressure wash. When the thermal relief valve opens cool water enters the pump and cools the system.

Here are five things to check before you assume the worst. A few factors could be causing this problem. Generally this means that the flow rate required by the pump cannot be supported by the water supply. If your pressure washer is not building pressure and the engine is surging there could be a few different causes.

A pressure washer is a small tool that can help you accomplish big jobs. Most of the time the pump and unloader valve are not causing the problem. From the outlet hose the water passes through the pressure washer gun and out the pressure nozzle. When the pressure washer gun trigger is depressed the pressurized water leaves the power pump and exits through the outlet valve and outlet hose.

This video shows the unloader valve in a cut away of a 2700 psi homelite pressure washer. If your pressure washer has no pressure start by changing your nozzle to a brand new tip. Typically the valve remains closed ensuring that no water is released from the valve unless you re purposefully using it. When you pull the trigger on your pressure washer if the water pressure is good for a moment but then weakens you have a surging issue.

Using the unloader valve is actually quite a simple process. One of them is a sticking unloader valve. In most pressure washer valves the valve is connected with whether or not you are holding down the trigger. Some power washers may be equipped with a pressure regulator system in place of an unloader valve.

About 90 of the time a pressure washer problem will not be caused by the pump. Usually a pressure washer is meant for cleaning strong dirt and dust with ease.