102 IS PROBABLY WHERE YOU NEED TO BE AT. I ALWAYS START AN INCUBATOR A LIITLE ON THE HOT SIDE. 102 WILL NOT HURT THE EGGS . THEY MIGHT HATCH A LITTLE EARLY BUT THAT'S OK. BECAUSE AT LEAST THEY WILL HATCH. IF YOU ARE RUNNING TOO COLD THEY WON'T HATCH OR HATCH LATE AND HAVE CROOKED TOES AND OTHER ISSUES. YOU SHOULD ALWAYS PAY CLOSE ATTENTION TOO HOW MANY DAYS IT TAKES FOR THEM TO HATCH AND AJUST ACCORDINGLY. IF IT'S NOT WORKING YOU HAVE TO FIX IT.