Determining whether a dryer thermal fuse, thermal cut-off, or high-limit thermostat is blown and defective requires performing a continuity test with a digital multimeter. First, unplug the dryer from the electrical outlet for safety and remove the rear or lower service panel to locate the small thermal fuse attached to the blower housing or heating element. Second, pull the wire connectors off the fuse terminals. Third, set your digital multimeter to the ohms resistance scale and touch the meter probes to the two fuse terminals. You can troubleshoot electrical safety components safely. You can verify that your dryer fuse is blown when the multimeter displays an infinite resistance reading (OL) or no beep, indicating an open circuit that requires replacing the fuse before the dryer will operate.
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