Oh dear!!! Nah dude, you've got a couple things slightly off here.
First of all kolsch is an ale style and doesn't need to be lagered... especially since you're using ale yeast.
Secondly, you definitely don't want to see your fermentation chamber to 70*F. During the height of fermentation the actually liquid temperature could be as high as 80*F... I usually get a 5*F spike but I've heard higher from others. Temperatures that high have a tendency to throw off-flavors that can interrupt otherwise delicious and prominent malt or hop flavors. You should consider setting it to 60*F instead.