Your cage should be 82-84 on the cool side and 92-94 on the hot. Your snake will move back and forth between the two temp zones as he/she sees fit. Don't worry about "where" the snake goes, just make sure you are set up with those temps.Originally Posted by Tails-N-Scales
Make sure he/she has a good choice of hides on both sides of the cage so that it doesn't not have to sacrifice proper temps for security.
If you are really worried, take your animal to a qualified and experienced reptile vet ... sometimes snakes that are sick will avoid heat and your snake might have a URI or some other type of illness.
-adam