i have fixed this a few years back. even when the washer is not plugged in to the mains but the water is attached and on it will still leak??
if it does then it is most likely this:
http://www.buyspares.co.uk/cgi-bin/product.pl?PID=1436173&query=Karcher%20K432%20M%20Super%20&model=K432%20M%20Super%20&path=68311
i have just had the same problem and fixed the same problem a few years back but had to order from the states == ££££
the link i have provided is a u.k site so u are lucky if this is your problem.
the way to find out if it is this plug is to open the washer case up (20 mns if careful does require star keys)
these washers are located under the power switch note: do not open up the mains unsrew the two screws underneath it. you should now see three of these plugs. now plug the water back in (be careful not to get water on the electrics or the motor.
i use a bolt up side down to push down and twist the plugs out. reverse to insert new one in.
good luck.
Geoff Platt
August 2010
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