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How can i fix my Karcher 620M Power washer?

After connecting and turning on the water supply, I push the button to turn on the power, the motor turns on and runs as long as i keep the button depressed, with a good pressure of water coming out of the lance. However when i release the button the electric motor turns off.
Ronald, February 2011
sounds like the lock down of the switch is broke, bypass the switch to prove it

Kenneth S, February 2011
link Click here to see other fixes for Karcher.