Ok, I finally broke down and did an all grain brew yesterday and really liked it. I made an Oktoberfest. The problem came after I pitched the yeast and put it in my ferm chamber. It is a little dorm fridge with an external digital temp controller. I had tested the setup already and the fridge works great +/_ 1 degree F. Problem is that I did not incert the temperature probe when I close the door, leaving it hanging on the site of the fridge. When I got home at lunch today, 21 hours later, I noticed the problem and put it in the fridge. It was at 38F. It is now up to 50F where it should be but I am worried I may have harmed the yeast. Do I need to worry?