Leaking will occur for many reasons, but most commonly if a gasket has worn areas. You can usually remedy the problem by removing the front cover of the washer and tightening the bolts to improve the gasket's fit. Your appliance will also leak water if the hoses are broken or the fittings do not fit properly. Internal hoses might potentially be the source of the problem. They might have a leak or a broken connection, causing them to leak during water cycles. Door seal problems fall under the category of leaks as well, and they're very simple to fix. Be sure to inspect the door seals on a regular basis to ensure they are free from dirt or excessive detergent which would prevent them from closing sufficiently.