Accidently? They are going to do what they want to do no matter what you do.
If they can't do a full brumtion then they will simply stop eating and move to the coolest part of their home.
It's out of your control for the most part.
Many times I have snake go off food. There's is nothing I can do about it but wait until they decide to eat again.
What part of the country are you in? This has a lot to do with how they are going to brumate.