When an electric or gas clothes dryer tumbles and runs normally but fails to produce any heat, the malfunction is typically caused by a blown thermal fuse, a tripped thermal cut-off thermostat, a burned-out heating element, or a blocked exhaust vent. In electric dryers, the resistance wire coil inside the heating housing can snap or develop a break. In gas dryers, an igniter failure or gas valve solenoid defect prevents the burner from lighting. You can troubleshoot heating circuits safely using a digital multimeter set to continuity. You can verify that your corrective action is successful when replacing a snapped heating element, resetting tripped thermal fuses, or clearing exhaust duct blockages allows the dryer to blow hot air and dry clothes efficiently once again.
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