How do I change the Default Query of a Views Exposed Filter with hook_form_alter()?
Try this out with hook_views_pre_build

/**
 * Implements hook_views_pre_build().
 */
function MODULE_NAME_views_pre_build(&amp;$view) {
    if ($view-&gt;name == 'VIEW_MACHINE_NAME') {
        //- Set the exposed filter to new value 
        $view-&gt;filter['EXPOSED_FILTER_NAME']-&gt;value = '0';
    }
}