Ball has not eaten in months

We moved in September,towards the end of the month. She definitely ate in October. Has not ate since. She just came out of a shed last week. She never wants to go near her heat source. She is still active in her tank. Put her food in there and she just ignores it. She is at 5 years old as we got her when she was right around a year old. Could there be something wrong with her?

Let's start with the basics.

How is she set up?
How are the temps and humidity?
What substrate is she on?
Has she lost significant weight?

Ball pythons can go long periods without eating often during winter months. I have a BP that went off food in October and just started eating again last month. That doesn't mean there is nothing wrong with your python but going off food is pretty normal.

I have a semi adult hog island boa that didn't eat for many months. He was eating small rats. So I offered him a mouse one day out of desperation. I had them around for my baby BP. He gobbled it right up! He has been eating mice ever since. He started out on mice as a baby of course, then to rats for probably a year. He is going through a second childhood I guess ha ha. Not that we want our BPs to switch back to mice from rats, but if she won't eat it is worth a try.