The 4 most common part(s) or condition(s) which cause the symptom Dryer doesn't heat are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1489053
If the dryer doesn't heat, but the drum turns, check the thermal fuse(s). The thermal fuse protects the dryer from overheating and helps to prevent fires. If the thermal fuse is blown, it will have to be replaced.
RepairClinic Item # 407685
The heating element assembly on an electric dryer can burn out over time. If the dryer doesn't heat, the element assembly should be checked for continuity. The heating element assembly cannot be repaired and must be replaced if defective.
RepairClinic Item # 508516
Although not common, if the dryer doesn't heat the high limit thermostat can be defective. It can be checked for continuity. If the thermostat is "open" the dryer doesn't heat.
RepairClinic Item # 1472768
The main control board is normally not at fault when the dryer doesn't heat. Check all of the other components in this troubleshooting guide before replacing the main control board. The main control board cannot be tested easily and must be replaced if it is defective.