Sounds like maybe the elements aren't in the proper locations in the kiln. Like Peter said, there are 3 different elements in that kiln, and if they're in the wrong positions the kiln won't fire evenly. Check the element resistance of each section of the kiln. I don't know if your kiln is 240V or 208V so here's both: 1231PK 208V  Top 6.7  Mid 8.5  Bottom 6.7 1231PK 240V  Top 8.9  Mid 11.3  Bottom 8.9 If the resistance measurements in your kiln are not correct, then you've either g