This video will explain how to test a heater coil to see if it defective. We will go over some common trouble shooting tips bef This video will explain how to test a heater coil to see if it defective. We will go over some common trouble shooting tips before replacing the heating element or dryer coil. We will outline the tools needed to replace the dryer coil, then provide a walk through of replacing a Kenmore 90 Series Dryer heating coil.