If your Hart pressure washer is leaking water, the pump assembly is the most likely source, especially if the pressure washer is leaking from the pump or leaking water from inside the housing. A pump that is several years old and used often may need to be replaced, while a newer pump that sees occasional use may only need new pump seals. If the leak is coming from the bottom of the pump, inspect the pump head, manifold, pump o-rings, and seals for wear or damage. The next likely cause is the pump itself, which may need to be rebuilt or replaced when internal components no longer hold pressure. A thermal release valve can also cause a pressure washer leaking water symptom during normal operation. If the machine runs without spraying, water in the pump heats up and the valve opens to release it. Turn off the pressure washer when it is not in use. Enter your model number to find the exact replacement pump assembly, pump, seals, or thermal relief valve for your Hart pressure washer.
01 - Hart Pressure Washer 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.