bosch dishwasher over flow
 

I just installed a used Bosch dishwasher that i got from someone who pulled it for cosmetic reasons (black, not stainless) 3 years ago and had it stored. It runs well, but 5-10 hours after the cycle shuts off, it fills with water on its own, then leaks out the front door onto the floor. I have re-leveled it after reading the troubleshooting manual. This has slowed the mysterious filling, but has not cured it. Could it be a defective flow valve and if it is, where is it and how do I get at it? Is this worth fixing?

thanks

gfleese