Kiln or annealer? They are designed to operate at different maximum temperatures. Kilns up to 2400 F. Annealers up to 1200 F. Both have coils which can heat to over 2400 F. Kilns do fine at 2400 F... but some annealers burst into flames at 2400 F. If the annealer power relay fails closed, it goes into thermal runaway unless the control circuit has a 'policing monitor' which automatically senses the runaway condition and shuts down the power. Does yours?
Me
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