I fixed this problem with my WK797. It would be worth taking the top lid off (a few screws) and checking if the outlet tube is connected. At least you should be able to see where its leaking from.
I now have a new problem with mine - it is causing the main house fuse to blow when I start it. There is also a burning smell. (fluff in the circuitry maybe). Anyway, if you have any ideas let me know.
regards, Ivan
Ivan Cicin-Sain, October 2007