My temp just got set on the rheostat for my UTH, its at 92.2. The probe is under the fur bark under my warm side hide. The ambient temp is 87.3 and its been that all day. And since ive set that rheostat its sat right at 92.2 give or take a few .1 or .2 degrees. But ill give it the rest of the day and see how it fairs.