I know some people would say to look for the nearest heat source, but honestly I think they'd just start looking for a good place to hide immediately. First thing I would do is check all of your air vents and make sure they aren't large enough that they could get in there. If your snake got into your ac ducting, you can pretty much call it curtains. Check EVERYTHING. They are really good at sqeezing into tight places you'd never think they could get into.