Hello Fit people! I'm having issues with my AC button that is defogger too, the compressor will come on when I'm pressing the button but as soon a release the AC button shuts down AC compressor...

Do I need to replace the entire button??

 

Yes, and you can get a cheap one on eBay or aliexpress. Good luck changing it out!!
There's a guide here in the forum on the process of swapping it out.

 

Or you can get one from a DIY salvage yard.