How do I change the default value for a filter?
you can try using hook_form_alter in your custom module.

     function yourmodule_name_form_alter(&amp;$form,&amp;$form_state,$form_id){
//print $form_id to get correct id of the exposed form
    if($form_id == 'views_exposed_form'){
      $form['field_program_tid']['#default_value'] = '44';
//you can unset "all" if you don't need it
      unset($form['field_width_value']['#options']['All']);

     } 
    }