Clint, you don't say if its electrical power you lose?
If it is, get an electrician to check it out. You could be shorting out the machine with a water leak?
The other option is the valve that triggers the power is jammed with debris/damaged and not responding.
See a website like espares.co.uk to find an exploded view of your machine and go from there.
If you are not sure what you are doing, get help. Karcher parts are readily available but keep a calm head on the prices, it may be better to get a new machine?
t.r.services, July 2009