FREE Download-Safety switches turn off the heating elements when the lid or door of a kiln is opened and are required on all kilns in Europe and Canada. Artists can test to see if a safety switch is working by raising the kiln lid or opening the door in a quiet room while the elements are turned on and listening for the sound of the elements turning off. Article originally published on page 69 in the Fall 2022 issue of Glass Patterns Quarterly®. by Arnold Howard