There could be several reasons why a dryer may stop heating after running for a while and then start heating again. Here are a few possible causes:
Thermal Fuse: Dryers have a thermal fuse that is designed to protect the appliance from overheating. If the temperature inside the dryer exceeds a certain threshold, the thermal fuse will trip and interrupt the heating circuit. Once the dryer cools down, the fuse resets, allowing the heating to resume. However, if the dryer continues to overheat, the thermal fuse may keep tripping, indicating a potential issue with airflow or other components.
Heating Element: The heating element in a dryer can wear out over time. If the element becomes damaged or develops a fault, it may stop producing heat intermittently. When the element cools down and resets, it may resume working temporarily until the fault occurs again.
Ventilation Issues: Poor ventilation or clogged dryer vents can cause overheating. When the dryer is running, the temperature inside can rise, and if the heat cannot escape properly due to restricted airflow, the dryer may shut off the heating element as a safety measure. Once the temperature decreases, the heating may resume until the issue recurs.
Thermostat Issues: Dryers have various thermostats that regulate the temperature inside. If a thermostat is faulty or out of calibration, it may incorrectly detect the temperature and shut off the heating element prematurely. Once the thermostat cools down and resets, it may allow the heating to function again.
It's important to note that diagnosing and repairing appliance issues can be complex and potentially hazardous. If you are experiencing problems with your dryer, it is advisable to consult a qualified appliance repair technician who can inspect and diagnose the specific problem and provide the appropriate solution.