I have installed a Leviton 15amp GFCI. The one I replaced said 15Amps on it's metal tab but it also said 20A on the body. The breaker that feeds this outlet is 15Amp. After I replaced it, I was not getting any power to the unit other than a small green light at the bottom corner of the new GFCI. I used a pen-tester and it showed power going to one of the black wires that connect to the lower side of the GFCI, but the other wires (white & black) had no power.
Any ideas out there as to what I am doing wrong? Thanks.