Contractor working on my floor failed to follow instructions & cut heating wire (the blue one on the orange mesh) after being told by us to "Not cut" the wire because we wanted more area heated. Initial call to CS told indicated that heater positively would not work w/o a patch kit...and that cutting off wire would dramatically increase the amperage (which puzzled me, as usually a longer wire has increased resistance which increases amperage). I immediately ordered a patch kit. But it arrived shortly after contractor talked to CS & made his "fix." When contractor called CS, he understood that all he had to do was connect the two wires (not the bare ground), seal off the end of the wire, and that it would work. He didn't test as instructed, but did check continuity. After tile was laid, he checked for heat, The floor did get warm, but very slowly and not to the extent of that under our original tile that was laid ~6 yr ago. Contractor said it was because of slower drying glue. Glue he used was not thinset, but something easier to work with that takes way longer to set/dry. If rating the original heating wire installation, TOP Marks would be awarded across the board. This time the rating of adequate was marked because of the comment saying that shorter wire increases amperage - which I understand is the opposite of what happens (longer wire has more resistance & requires more amperage??? But maybe I'm wrong?)