If the temps throughout the house are equal, then I would suggest looking in the small tight areas. The snake will look for security, which is usually a smaller area. I've heard of them climbing up into the folds of curtains too. So, my suggestion would be to look in the small tight areas where you snake would feel secure. As someone else said, get out a heating pad and place in in a dark corner or somewhere you think a snake would crawl to.

As someone also said, just because a door was closed doesn't mean you forget about that room. Turn your heat down a few degrees, this will usually stop the snake from being comfortable and traveling throughout the house.

Good Luck!
Jim Smith