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Dryer won't start

01 - Washer/Dryer Combo Thermal Fuse
The thermal fuse is a safety device designed to protect the dryer from overheating. The fuse is located on the blower housing or at the dryer’s heat source such as the heating element on electric dryers or at the burner on gas models. The fuse should be closed for continuity meaning it has a continuous electrical path through it when good. If overheated the fuse will have no continuity meaning the electrical path is broken and the fuse has blown. A multimeter can be used to test it for continui...ty. Be aware that a blown thermal fuse is an indication of a restricted exhaust vent from the dryer to the outside. Always check the dryer venting when replacing a blown thermal fuse.
Required Part
Washer/Dryer Combo Thermal Fuse
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Most Common Solution
02 - Door is not fully closed
Confirm the door is fully closed; the dryer will not start with the door open. Remove anything that is obstructing the door.
03 - Washer/Dryer Combo Start Switch
To determine if the start switch is defective, attempt to start the dryer. If the dryer hums but does not start, the start switch is not at fault. If the dryer does not respond or make any noise, the start switch could be at fault. Use a multimeter to test the start switch for continuity. If the switch does not have continuity, replace it.
Required Part
Washer/Dryer Combo Start Switch
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Common Solution
04 - Washer/Dryer Combo Control Board
A dryer's control board controls the voltage being sent to all of the appliance's electrical components. If the board is defective, it may not allow the dryer to start. You can inspect the board for signs of damage or a shorted component. You can also use a multimeter to test for voltage reaching the drive motor after reviewing the dryer's wiring diagram.
Required Part
Washer/Dryer Combo Control Board
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Common Solution
05 - Washer/Dryer Combo Door Switch
The door switch activates when the dryer door is closed. On most dryers, the door switch makes an audible clicking sound when it activates. To determine if the door switch is working, try starting your dryer and then listen for the “click.” If the door switch makes a clicking sound, it is probably not defective. If you don’t hear a click, use a multimeter to use the door switch for continuity. If the switch does not have continuity, replace it.
Required Part
Washer/Dryer Combo Door Switch
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Common Solution
06 - Washer/Dryer Combo Idler Pulley
A dryer's idler pulley puts tension on the belt to rotate the drum. If the idler pulley is worn out or damaged, the belt can break or fall off, and actuate a belt switch which can prevent the dryer from starting.
Required Part
Washer/Dryer Combo Idler Pulley
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Common Solution