cheg

Hello

5 years ago I bought an Accent GSi. I got it in the middle of winter,
and I noticed that everytime I turned on the defog mode, the a/c light
would come on. I got the dealership to disconnect that since I was
under the impression the a/c compressor sucks a lot of gas.

I just picked up my Tuc a few days ago and noticed it does the exact
same thing. Does the a/c thing affect gas consumption when heat is
blowing out instead of cold air? Can I disconnect this without having
to go to the dealership? Should I not bother?

Thanks for your input

Alex