Shedding?

the low air temperature may be why your BP isn't eating, but then again there are about a thousand things that can cause a BP to stop eating.

Shedding that close together puts up a red flag for me... as does her size. She is 2 years old and only 400 grams?

How is your humidity?

That is a tiny snake at two years my two year old mojave male is 1600gm and the female is 2200gm. My smallest whom isn't a year yet is 500gm. I would agree about the ambient being low racks usually work better in stable temps of 26-27ºC.

The size makes me wonder if there is not something else going on as well. Have you done a fecal exam lately? It is possible the sheds and non feeding are related to an internal parasite.

400 grams is very small for a 2yr old snake. My boy is 2 and ges 960 grams and even hes a little under weight. Have you taken it to the ver to be checked for parasites. They will take all nuteition from your snake and could be why its not eating

She is about a year and 7 months to be exact.
Her humidity is running around 50-60%
ill check if she is loosing weight but i think i must do a parasite flush just to be safe.

"a parasite flush just to be safe."

What do you mean? If you intend to treat for general parasites with out an exam I would actually suggest the exam first. General treatments do not work on all parasites so you might guess right or wrong. thinking you have fixed a problem when you have not can generate a bigger problem later. Given the situation a vet visit might be in order either way.

That kind of does sound a bit like Protozoa :/ (parasites). My first BP had them.

I just checked my records and weighed her again.
She shed last on the 12 June and weighed in at 570g.
She is in the blue now and weighs 540g.

For a healthy baby that is fairly normal shed cycle I have little ones that shed every 2-3 weeks the weight loss and small size is more concerning. What is the length (aprox?) of the snake. It it short? Does the snake have that typical constrictor shape smaller head and large body or is it fine and slim looking? Can you take a photo of the snake stretched out some?