CONCERN: Customer reports dryer is not heating. CAUSE: Inspected dryer wall receptacle for proper voltage to the dryer, voltage to the dryer is normal at the time of inspection. Inspected dryer terminal block and cord for visible shorts, no shorts found at terminal block or cord at the time of inspection. Inspected dryer heater continuity on the heater element, heating element tested good at the time of inspection, Tested thermal safety for continuity, no continuity present, Found dryer thermal safety shorted out. CORRECTION: Replaced dryer thermal safety and tested. Operation now normal.