Because so many have the Costco Visa Signature card, I thought I'd report my findings. Initially, I was all happy because refurb items weren't listed specifically in the free extended warranty exclusions. Upon calling the warranty claims department, I soon found out otherwise. They interpret a refurb item to mean it's a used or pre-owned item, and they're excluded. Dang! So here are a couple lines among others from their list of exclusions:

WHAT’S NOT COVERED

â–  Used, antique or pre-owned items.