Pressure Washer Leaking Water From Pump

If there was no unloader valve then pressure would build inside the system when not in use so when you did pull the trigger it would stall the engine or explode a weak link part probably the pressure hose o ring.

Pressure washer leaking water from pump. My pressure washer pump is leaking water. Power washer leaks are common. Pressure washer leaking water out the bottom of the unit in this case unplug the machine. When the thermal relief valve opens cool water enters the pump and cools the system.

The pump has pistons inside of it that create pressure to pull the water from the intake and force it out of the nozzle. Some people have found hairline cracks in the plastic pump cylinder head karcher fit to many of their power washers. 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. It is important to fix power washer leaks too.

If you let your pressure washer run for longer than 2 minutes at a time it will enter into bypass mode. A leaking pump suggests that one or more of the seals on each piston has broken or worn and is. In most cases this is not an internal leaking problem. If your pump is leaking water it could be caused by the following.

The consensus of opinion seems to be that the problem lies in internal cracks. To prevent the pump from. If your power washer is leaking water directly from the pump and there is no noticeable damage such as a crack on the pump it is likely that the internal piston seals are worn or broken. A few specific areas on a power washer unit are more prone to water leaks.

The pressure washer is left running while it is not spraying water the water in the pump will begin to heat up. I have found several complaints on line by people who say their karcher pressure washer pulses and leaks when the trigger is off. The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high. When the water temperature rises above the acceptable limit the thermal release valve opens to allow the hot water to exit the pressure washer.

Not fixing them results in loss of pressure in the system additional costs for water and water runoff where it may be unwanted on the job. This means that the water inside of the pump is continually flowing and heating up. Once the pump has cooled the thermal relief valve closes and the pressure washer operates normally. For all your pressure washer spare parts go to http bit ly 1hnpme3 if your pressure washer is leaking or pulses when not in use it won t be performing to.

The leak could be due to the normal operation of the thermal release valve. If the pressure relief valve purges constantly and doesn t close properly replace it. The leaking is caused by water leaking from the adapter attached to the water inlet because the clear adapter is not seated properly. These pistons must remain sealed in order for the pump to properly pressurize the water.

I have even found videos posted on youtube demonstrating the problem one of which is posted below.