Keezer controller question

My thread in DIY isn't producing so here goes: My keezer will be living in an unheated garage in MA. I want to know if the controller will work properly if its mounted inside the keezer to keep it in operating temp range in winter. I know about moisture and will deal with that but will the controller work if its in the same environment its trying to control?

Its the bargain ebay one http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270547347167

If they operating temp of the unit will go below what you have your keezer set at, I don't forsee any problems. This only issue I can think of is that it might run a little slower than normal.