I can't recall the brand but, there is one (and only one to my knowledge) brand that produces regulated heat rocks that are also designed to fail in the "off" position. Which would make them safe to use for animals known to require belly heat from basking spots. Of course ball pythons being mostly nocturnal are not known for basking on rocks and tarmac at all so this would be a pointless addition.
I forget the brand so, if anyone knows of this please share that info. It may be useless for balls but could be useful for some species.
And, as TheSnakeGuy says, since it is highly unlikely you have the single manufacturer's heat rock that could be considered safe and your python doesn't need it anyway unplug it and use it as decoration only or throw it out. That will save you a trip to the vet at best or the loss of an animal at worst.
Pic's of your set-up might help. Depending on the set up enclosures can be insulated if in cooler rooms. Ceramic heat emitters, heat bulbs, Under Tank Heaters, or heat tape could help.
PS, if the top is open screen cut a piece of lexan, acrylic, plexiglass or similar material and dril some holes in it to allow airflow but, at a slower rate than a fully open top. This will help retain both warm air and moisture.