category.php

<?php get_header(); ?>

<pre><code><?php print_r($wp_query) ?></code></pre>

  <?php if ( have_posts() ) : ?>
      <ul class="unstyled stacked">
    <?php while ( have_posts() ) : the_post(); ?>
        <li><a class="" href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
    <?php endwhile; ?>
      </ul>
    </div>
  <?php else : ?>
    <p>nope</p>
  <?php endif; ?>

<?php get_footer(); ?>

wp_query output

WP_Query Object
(
    [query] => Array
        (
            [category_name] => unitary-gas-heating
        )

    [query_vars] => Array
        (
            [category_name] => unitary-gas-heating
            [error] => 
            [m] => 0
            [p] => 0
            [post_parent] => 
            [subpost] => 
            [subpost_id] => 
            [attachment] => 
            [attachment_id] => 0
            [name] => 
            [static] => 
            [pagename] => 
            [page_id] => 0
            [second] => 
            [minute] => 
            [hour] => 
            [day] => 0
            [monthnum] => 0
            [year] => 0
            [w] => 0
            [tag] => 
            [cat] => 2
            [tag_id] => 
            [author_name] => 
            [feed] => 
            [tb] => 
            [paged] => 0
            [comments_popup] => 
            [meta_key] => 
            [meta_value] => 
            [preview] => 
            [s] => 
            [sentence] => 
            [fields] => 
            [menu_order] => 
            [category__in] => Array
                (
                )

            [category__not_in] => Array
                (
                )

            [category__and] => Array
                (
                )

            [post__in] => Array
                (
                )

            [post__not_in] => Array
                (
                )

            [tag__in] => Array
                (
                )

            [tag__not_in] => Array
                (
                )

            [tag__and] => Array
                (
                )

            [tag_slug__in] => Array
                (
                )

            [tag_slug__and] => Array
                (
                )

            [ignore_sticky_posts] => 
            [suppress_filters] => 
            [cache_results] => 1
            [update_post_term_cache] => 1
            [update_post_meta_cache] => 1
            [post_type] => 
            [posts_per_page] => 10
            [nopaging] => 
            [comments_per_page] => 50
            [no_found_rows] => 
            [order] => DESC
        )

    [tax_query] => WP_Tax_Query Object
        (
            [queries] => Array
                (
                    [0] => Array
                        (
                            [taxonomy] => category
                            [terms] => Array
                                (
                                    [0] => unitary-gas-heating
                                )

                            [include_children] => 1
                            [field] => slug
                            [operator] => IN
                        )

                )

            [relation] => AND
        )

    [meta_query] => WP_Meta_Query Object
        (
            [queries] => Array
                (
                )

            [relation] => 
        )

    [queried_object] => stdClass Object
        (
            [term_id] => 2
            [name] => Unitary Gas Heating
            [slug] => unitary-gas-heating
            [term_group] => 0
            [term_taxonomy_id] => 2
            [taxonomy] => category
            [description] => 
            [parent] => 0
            [count] => 3
            [cat_ID] => 2
            [category_count] => 3
            [category_description] => 
            [cat_name] => Unitary Gas Heating
            [category_nicename] => unitary-gas-heating
            [category_parent] => 0
        )

    [queried_object_id] => 2
    [request] => SELECT SQL_CALC_FOUND_ROWS  wp_posts.ID FROM wp_posts  INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1  AND ( wp_term_relationships.term_taxonomy_id IN (2,3,6) ) AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 10
    [posts] => Array
        (
        )

    [post_count] => 0
    [current_post] => -1
    [in_the_loop] => 
    [comment_count] => 0
    [current_comment] => -1
    [found_posts] => 0
    [max_num_pages] => 0
    [max_num_comment_pages] => 0
    [is_single] => 
    [is_preview] => 
    [is_page] => 
    [is_archive] => 1
    [is_date] => 
    [is_year] => 
    [is_month] => 
    [is_day] => 
    [is_time] => 
    [is_author] => 
    [is_category] => 1
    [is_tag] => 
    [is_tax] => 
    [is_search] => 
    [is_feed] => 
    [is_comment_feed] => 
    [is_trackback] => 
    [is_home] => 
    [is_404] => 
    [is_comments_popup] => 
    [is_paged] => 
    [is_admin] => 
    [is_attachment] => 
    [is_singular] => 
    [is_robots] => 
    [is_posts_page] => 
    [is_post_type_archive] => 
    [query_vars_hash] => 6e027b855b20566aaf4e48615df54439
    [query_vars_changed] => 
    [thumbnails_cached] => 
)