I can't find the reason for my devit problem

[lucho/lachezar/]

Can you say if your kiln is responding accordingly to the program? If only one element is gone or one phase (in 3 phase circuits) is low (voltage) or bad contact it may cause temperature differences in the kiln beyond the thermo-couple ability to read...

Then following Cynthia's, post I used to have problems with glass wrapped in paper and in wooden boxes and exposed to rain...

Lucho