The UTH goes on one end, NOT in the center.
Your trying to make one end warm and one end cool so the snake can adjust it's temperature by moving from one end to the other.
It can't do that with heat in the middle of the tank.
Get a probed thermometer, its the only way to read temperatures.
Re-read the care sheet sticky so you know how to care for your new friend
My heat pad is on one side, must have misunderstood me. I will see if i can pick up a t-stat this weekend. Petland carry them do you know?