Change #comments to #disqus_thread

add_filter( 'get_comments_link', function( $link, $post_id )
{
    return get_permalink( $post_id ) . '#disqus_thread';
}, 10, 2 );

Where i have to put this filter? I tried within theme/functions.php but was incorrect.Thanks for your response Vanluda

Hi,
In my case if it worked, but the icon showing before disappears and only displays text

<a href="<?php comments_link(); ?>" class="comments"><i class="fa fa-comments-o"></i> <?php echo get_comments_number(); ?></a>

Before
https://s10.postimg.org/ajfmzs2zt/before.jpg
(Icon #Comments = icon 2)

After
#Comments Comments = 10 Comments (icon disappears)
https://s10.postimg.org/j0f5ap7op/after.jpg

This should happen?

Leandro thanks for join us,

the problem is not that you mention but,
in my homepage there is a slider which has a link button for each post comments.
Once discus system is activated that button does not work.

Hi, I started researching and…

First:
It is better Disqus Conditional Loady, install it and configure it so (MAKE A BACKUP OF YOUR WEBSITE)
Disqus Settings;
https://s20.postimg.org/kzvu1inm5/Disqus_Settings.jpg
Advanced Features;
https://s20.postimg.org/6fer6osnh/Advanced_Features.jpg

Second:
On https://YOUR_WEB_ID.disqus.com/admin/settings/
Configure it so…
Settings Disqus;
https://s20.postimg.org/gbfu6byfh/Disqus_Moderation.jpg

Finally, verify copy and paste this code into functions.php of your current theme

// #coments to #disqus_thread on Comments Section
add_filter( 'get_comments_link', function( $link, $post_id )
{ return get_permalink( $post_id ) . '#disqus_thread'; }, 10, 2 );

I hope that works for you! Greetings.

Thanks for help Leandro i tried everything above and the link works correctly!!!