An unregulated heat pad can also get hot enough to severely burn your snake. If you are lucky you will be left with a big vet bill and you will still need to get a thermostat. If you are unlucky it will kill your snake.
This is what an unregulated heat source did to a ball python that I took in last year. Unfortunately she didn't make it.
https://ball-pythons.net/forums/show...cks-Just-don-t!