Recently I noticed my driver side does not heat up when i turn on defroster, my pass-side does not have the issue, it does feel warm when i touch.
i researched online and does not seem there's a fuse for heat-mirrors.

any suggestions? FYI i checked the wires, they're still connected to the mirror.

 

Here's a little help, someone else just asked similar question.

https://acurazine.com/forums/2g-tsx-...2013-a-964409/

 

thanks for the link!