Sorry to hear about your snake being MIA. I know they like warm, enclosed, dark areas. I have heard of them finding their way under stoves/ovens as well as fridges. Check under, behind and even up and inside the workings of the appliance. I was recently at a fish/reptile shop near me and one of his BPs escaped over night. He had gotten into the back of the freezer unit and the shop owner had to pull the unit apart and pull the angry snake out. They were both fine after a bit, but both were stressed due to the whole adventure. Be careful to move furniture/appliances slowly so you don't injure the snake. Good luck!!!