Automatic AC Defroster in Civic.
 

Not sure if this applies to anyone else's cars but the 7th gen civics, but I just found out for the defroster can have the AC from automatically coming on...

https://2k1civic.madstatic.com/2006/0...-automatic-ac/

Was wondering if it would be permanent or would change back on next restart...

er, nvm...its permanent until you decide to change it back. Nice to know though, I guess.

I know on some cars the A/C will kick on and off while the defrosters are on to keep the A/C working all year which makes it mor reliable when summer comes.

The AC comes on when the defroster is on to de-humidify the air. The dryer air removes the moisture building up on the glass(fog) a lot better than just hot air. Most cars have a small switch on the linkage that makes contact when the defroster is selected. Where it is on your car is up to you to find. I suggest you get a repair manual or ask your mechanic. It may be completely electronic and the only option there would to directly unplug the AC compressor clutch so it cannot engage.