Question about Karcher PSI Electric Pressure Washer
Hi. My machine runs then stops. runs and stops as if it want to take it to the correct pessure and then when it reaches that pressure it stops. When i open the water itself without running the motor the water came out the delivery end.
So when you are using the machine & keeping the trigger pulled open the machine builds up to pressure then knocks off all the time.
If this is so the machine is not at fault & is doing what it is meant to do & protect its self from over pressuring & the fault is in the nozzles you are using.
You need to check the nozzle size is correct for the machine & also airline the nozzle to clear of any dirt.
Posted on May 02, 2014
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Posted on Jan 02, 2017
They have a problem. I removed both valves and lubed with lithium grease as I was told. Unit is now working for how long who knowes.
Posted on May 19, 2009
check the non-return valves in the pump block. if these are damaged or dirty you pressure will be greatly reduced. they are located behind the 3 lage brass hexagonal caps.
I hope this helps
Posted on Sep 20, 2009
This sounds like a problem with the pressure sensor which is located on the water inlet side of the pump. This switches the power to the motor when there is sufficient inlet pressure and water flow. This pressure switch can get partially siezed up, and not operate correctly.
You will need to dismatle the unit and identify the pressure switch, dismantle it and lubricate it with silicone grease.
Posted on Feb 28, 2010
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