WordPress search not searching pages’ content

My wordpress site doesnt search for pages’ content. I have checked for the existence of the following filter that could prevent search from searching pages but there aint any

add_filter('pre_get_posts','myfunction'); 

What else could I check for?
Any help would be appreciated.

Regards,
Loveleen

Try this:

function filter_search($query) {
    if ($query->is_search) {
    $query->set('post_type', array('post', 'page'));
    };
    return $query;
};
add_filter('pre_get_posts', 'filter_search');