Yeah, the only problem is they cant survive that long with out heating.
-Check warm spots in your house. If you search on google about your problem they have a big list of stuff to do like where to search, like house hold appliances that are warm and stuff like that. Also do the flour thing. Idk if it will work but if it does that would be cool. Im guessing that your snake has found a hiding spot and is going to stay there, not roam the house.