Not the OP, but I just got a new S2, after lurking on this forum for a while, and it tripped the GFCI within a few minutes of turning on. I thought it could be moisture in the element, so I plugged it into a Non GFCI outlet and ran it for a few hours. Then tried it in the GFCI and it tripped right away. I took it apart and using a VOM, got a reading of 18 ohms from one lead of the element to the other, which sounds right, but when I ran a check from one lead of the element to the ground of the box, the reading was around 6,000 ohms. ( that is with wires removed from the heating element). Steve suggested I try removing the ground wire and cleaning off where it is attached to the body, then reattaching it. Still tripped. He sent a new element, which arrived in no time. I checked it got 18 ohms from one lead to the other, but infinity from either lead to the metal bracket towards the rear of the element. Installed it, ran it for an hour just to test, and it never tripped the GFCI, so I think the problem is solved for me.