When a clothes dryer's motor runs and the drum tumbles normally, but the machine fails to generate any warmth, the issue is typically caused by a blown thermal fuse, a tripped high-limit thermostat, a burned-out heating element, or a blocked exterior exhaust vent. If lint restricts airflow, extreme heat builds up in the heating box, causing the safety fuse to blow instantly. You can troubleshoot heating components safely using a digital multimeter set to continuity. You can verify that your corrective action is successful when clearing exhaust duct blockages, replacing a blown thermal fuse, or installing a new heating element restores normal hot air generation and dries your laundry completely.
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