What could I wire my efans into so that they will come on when my ac is turned on. I know I could do a toggle but would like to run a temp switch

 

Do you have one or two fans. I know on two fans one is wired to the ac compressir. So when ac is on it turns that one on. Should be a thread on here if you use the search. If not google, how to wire electric fans to ac

 

You should just be able to use a relay, then pull a 12v signal from the a/c system - whatever wire i used to switch the a/c on. Use that wire to feed the relay coil - usually those are 1Ω coils so current draw is pretty low.