Has anyone had problems with their APM elements purchased after the supply chain shortage and being available again in July 2022? I use zone control and my center elements do not seem to be able to keep up, so the kiln continually stalls out, usually without an error code. Even in single zone the center section of my 1231 pk fires cooler than the top and bottom. I've replaced every part of the kiln and the problem still exists, so I am left only with the elements as the problem. The kiln worked
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