Pressure Washer Thermal Relief Valve Leaking

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

Pressure washer thermal relief valve leaking. Only 5 left in stock order soon. The pressure washer is left running while it is not spraying water the water in the pump will begin to heat up. This just means that a thermal relief valve has been installed on your pump to prevent over heating. Oem 5140095 85 replacement pressure washer valve thermal relief dh4240 for dewalt.

4 7 out of 5 stars 11. When the water temperature rises above the acceptable limit the thermal. If the pressure washer runs for more than 5 minutes when the spray wand isn t in use the water in the pump often overheats causing the thermal relief valve to open and discharge hot water onto the ground. The leak could be due to the normal operation of the thermal release valve.

Easy fix for faulty valves on pressure washers. The thermal relief valve is usually preset to discharge water when it reaches 195 degrees. Seeing water spewing out of your pressure washer can be a distressing sight. Until you pull the trigger your pressure washer is in by.

The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high. If the thermal release valves seal is compromised it may continuously leak water and cause the washer to lose pressure. When the thermal relief valve opens cool water enters the pump and cools the system. Pressure washers are extremely useful when they re needed as most most owners of pressure washers know but the sensitivity of their systems also makes them prone to setbacks.

Owners of pressure washers often report symptoms that are difficult to diagnose like low pressure high pressure no pressure surging pressure and pump issues.