Refrigerating a sick newt

So I have read about refrigerating newts and axolotls for more than a few kinds of symptoms and I am still a little confused about the process and how it helps. I wondered if anyone could explain it (such as when, how, how long, and what for) to me a little more or direct me to a link where I can read about it.
The reason I am asking is because I bought a paramesotriton chinensis the other day which seemed to be in decent condition though it's tank mate was nearly dead - had a large infected wound on it's face. The one I bought has eaten and seems to be doing alright though it does not seem to be active at all but I assume that could be stress from it's previous conditions. Would it be helpful to chill this newt to reduce stress and make sure it doesn't also have infections or should I wait and see how it goes for a while longer?

no! don't overchill the newt. The fridge is much too cold. Ice packs to keep the temp 65-60f would be just fine. The newt will need time to adjust to its new home. just be patient, give it a few days, and don't try to freak it out, if it doesn't want to take a bloodworms from a toothpick, or a cricket from tweezers, try again later, but don't scare it.

Audrey, as to why it helps; It should help because bacteria can't reproduce as fast in colder environments. Since newts are cold blooded that's fine. There could be other reasons though, this is what I know.

Coen's got it partially right. Fridge treatments help slow down the reproduction of the pathogens. Not ALL pathogens slow in the cold though. But almost all species of caudates prefer colder temperatures, so they do just fine in the fridge, while the pathogens slow, allowing the immune system of the caudate to catch up.

I have the newt at 65F right now because that is the temp in my newt room. I guess I didn't say, but I was assuming that chilling in the fridge would be no lower han 40 F or so, maybe that's too low, that's why I wanted more details.
He's already eaten some blackworms though the waste left could have been vomit instead of poo. It looked weird.