Tutco SureHeat (Sylvania) Air Heater Failures Due to Voltage Overshoot or Zero Airflow

Element failures caused by voltage overshoot while airflow was present.  Since the airflow was present, the damage occurred only at the air exit end. download

This element had a voltage overshoot with airflow, but not enough to keep the ENTIRE length of the heater element below 1900F.  Damage occurred at the middle and air exit ends.

Element failure caused by applying voltage when there is zero airflow.  Please note the damage occurs along the entire length of the coiled element.