Dryer Will Not Start? How to Find the Cause
When a dryer will not start, the machine stays dead when you press start. Usually, the door switch, a blown thermal fuse, or the start switch is at fault. First, confirm the dryer has power and the door clicks shut. Then, work through the start parts below.
Parts to inspect for a dryer that will not start
1. Door Switch
The door switch tells the control the door is closed so the dryer can run. When it fails, the dryer will not start even with the door shut. Therefore, test the switch for continuity as the door closes and listen for its click. Replace the switch if it does not make contact.
2. Thermal Fuse
The thermal fuse cuts power if the dryer overheats, usually from a blocked vent. When it blows, the dryer may go dead or run without heat. Therefore, test the fuse for continuity and clear the vent that tripped it. Replace the fuse, but always fix the airflow first, or the new one will blow too.
3. Start Switch
The start switch, or push-to-start switch, sends power to begin the cycle. When it wears out, you press start and nothing happens, though the light may be on. So test the switch for continuity while you press it. Replace the start switch if it does not close the circuit.
4. Drive Motor
The drive motor turns the drum and runs the blower. When a winding fails or the bearings seize, the dryer hums, trips, or stays silent. Therefore, check that the motor shaft turns freely and test the windings. Replace the motor if it is open, seized, or will not restart when hot.
5. Belt Switch
The belt switch stops the dryer if the drive belt breaks, so the motor is not left spinning. When it sticks open or the belt snaps, the dryer will not start. So check the belt and test the switch for continuity. Replace a broken belt and a failed switch to restore start.
6. Main Control Board
The main control board runs the electronic dryer and powers the motor, heater, and sensors. When it fails, the dryer may be dead, skip steps, or ignore the buttons. Therefore, inspect the board for burnt spots and confirm it powers each output. Replace the board if it no longer responds.
Get the parts
We supply OEM and replacement parts in bulk. Browse the Appliance Parts catalog, or request a bulk quote for volume orders.
Is the unit old or failing often? A new ENERGY STAR certified dryer can cut energy use, so weigh a repair against a replacement.
Most of the time, a dryer that will not start traces back to one worn part. So replace it, then run a short cycle and confirm the fix.