When water backs up into your sink while the dishwasher runs, there's a clog somewhere. To fix a dishwasher overflowing into a sink, you simply need to find this clog and remove it. There are several areas between the sink and the dishwasher where the clog could occur, so start with so...
To unclog a sink with a garbage disposal, plunge the drain, and tighten a clamp over the rubber part of the drain line to your dishwasher. This can be found under your sink. STEP 2: Place the plunger over the clogged sink drain and fill it with water (approx. 3–4 inches). Hold a...