I agree with Asherah, it sounds like your snake could be burned. Not only is it important that you're using a thermostat, but that your probe is making intimate contact with the heat source, If it is not your heat source could be full on which could be the reason for the overheating.
Brian Gundy
For Goodness Snakes
408-981-6694
fgsnakes@sbcglobal.net
Eric or Deborah is it OK for me to include my name and contact information?
Thanks in advance for your response.