When a Powerstroke pressure washer is leaking water, start by inspecting the pump assembly, the most likely source of a pressure washer leaking from the pump. An older pump that sees frequent use may need complete replacement, while a newer pump used occasionally may only need a rebuild or new pump seals. If the leak continues after checking the seals, inspect the pump itself for damage, worn pump components, or failed gaskets and replace the pump when rebuilding is not practical. Another possible cause is the thermal release valve. This valve opens during normal operation when water trapped in the pump becomes too hot, especially if the pressure washer is left running while you are not spraying. In that situation, the valve releases hot water to protect the pump, so a pressure washer leaking water from inside may not have a failed part. Shut the machine off when it is not in use and allow it to cool before testing. Enter your PowerStroke model number to find the exact replacement pump assembly, pump, pump seals, or thermal release valve for your pressure washer.
01 - PowerStroke Pump Assembly
You may need to rebuild or replace the pump assembly. If the pump is more than a few years old, and you use the pressure washer fairly often, replace the pump assembly. If the pump is relatively new, and you don’t use the pressure washer often, either rebuild the pump assembly or replace the pump seals.
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You may need to rebuild or replace the pump. If the pump is more than a few years old, and you use the pressure washer fairly often, replace the pump. If the pump is relatively new, and you don’t use the pressure washer often, either rebuild the pump or replace the pump seals.
The leak could be due to the normal operation of the thermal release valve. The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high. If the pressure washer is left running while it is not spraying water, the water in the pump will begin to heat up. When the water temperature rises above the acceptable limit, the thermal release valve opens to allow the hot water to exit the pressure washer.