Dryer lint filter assembly with felt rim seal attached. Proper air flow is critical to dryer operation so the filter should be cleaned before every load. Replace the filter if it has any tears or rips in it.
Dryer heating element assembly. If the dryer no longer heats then the heating element may have failed, but it is not the most common cause. The most common cause for a dryer to stop heating is a blown thermal fuse.
Dryer moisture sensor bar. If the dryer timer does not advance properly inspect the moisture sensor bars for damage which can cause the automatic drying cycle to not work properly.
Dryer thermistor assembly with wire harness. If the thermistor is defective, it can prolong or shorten the drying time or cause a fault code. A defective thermistor is not responsible for a dryer not heating.