Whenever you have an escape you should always be cautious. Up your temps a couple of degrees and keep an eye on him. Even if he does develop an RI your way ahead of it so the temp increase should be enough to fight it off without vet intervention.
With that said he's been on quite a journey it sounds like so I would check him over for injuries and burns and watch his behavior over the next couple of weeks. If you notice anything strange, signs of pain when handling, those kinds of things I would take him to a vet. You don't know if he ate anything either (not saying that you do.. but) If you have mice or rats in your home than I would take him to a vet. House rats and mice eat all kinds of gross things that you don't want in your ball python's belly.
My bet is he would be too stressed to hunt so I don't think you have that to worry about. Just up temps and watch for signs of injury. Consult a vet if your concerned.
Cheers,
Chris.
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