Originally Posted by Techy
99% of GFI's i deal with you would have wired backwards, the yellow sticker is usually covering the 'Load' terminals, you want to connect to the 'Line' terminals.
OK OK I may have gotten the names wrong. But I have to say I don't feel silly because the wording is counter-intuitive in my opinion. Load means something that does the heavy lifting or "carries the load" as they say. Line means secondary or "down the line" as they say or after the fact.
I did some more reading on the internet and it appears you might have figured out my error. Will try to reverse the connections and see if that works.