Each time we offer free shipping, there is a different code. Typically, the free shipping is offered on what we call our Prospect Catalog - meaning they're going to folks who we HOPE are interested in our product. So that changes each time we have a new catalog. I honestly don't know what the new code is but I can tell you we don't usually have a prospect catalog in the winter.

I know its not the code, but I hope the info helps.