A dishwasher that backs up is an inconvenience, and also can be really nasty. If months of food bits are swirling around your dishwasher and onto your kitchen floor, here's what to do, according to a skilled Minneapolis plumber:
1. Clean out the drain by removing the drain cover and gently auguring the drain.
2. Remove the drain trap (usually under the dishwasher) and clean it out.
3. Clean out the ports to the sink (the strainer).
If you clean out everything and your dishwasher is still backing up, then you know it's time to call in for professional help.
