Running a test fire This page is a work in progress. After some kiln repairs it may be required to run a test fire. Typically this will happen after a relay or element replacement to ensure the kiln is operating normally. Empty the kiln, if not already done. Place a shelf at each zone with pyrometric cones to record temperature. Each set of cones should consist of 1 below target temperature, 1 at target, and 1 above target. No other pieces should be fired. Run the kiln's program normally. Record the runtime and cone behaviour. Compare kiln performance against Expected performance . Make repairs and Troubleshoot as required.