If you think some of your equipment is faulty, time to get a new one. Snakes are curious animals. Its not weird if he doesn't want to be in his hide, especially if hes new. They are just as curious as any other creature. As long as you get your temps right, he will go as he pleases.

When you were talking about yawing several times back to back. Makes sure hes not weezing or having any discharge out of his mouth. If you can, open his mouth and see if you have a buildup of bubbles. If you have that, your snake could have an RI infection where you would need to take him to a dr.