I assume you mean dishwasher and not washer ck drain hose under sink if not installer properly hose tends to pull down and kink ..should be installed vertically not horizontal also be sure to clean under inside screen in bottom may be plugged also have you replaced disposer or installed one recently if so be sure plug in drin connection has been knocked out..if that is a washer get as much water out as possible lean washer backward against wall pump may be plugged pump just twist locks in bottom of tub and hose clamps can be removed with fingers NO TOOLS NEEDED!!!!!!!!