Dryer Won't Stop Running (Troubleshooting Guide)

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Quick answer

If your dryer won't stop running, first unplug it and check the timer and thermal fuse. Replace faulty parts if needed.

Unplug the dryer
Do: Turn off the circuit breaker or unplug the dryer from the wall outlet.
Observe: Dryer stops immediately when power is off.
Means: Electrical issue likely. Proceed with testing.
Next: Test the timer
Test the timer
Do: Use a multimeter to check continuity in the timer switch. Set to Ohms and test across terminals.
Observe: No continuity or erratic readings.
Means: Timer is faulty and needs replacement.
Next: Replace the timer
Check thermal fuse
Do: Locate the thermal fuse (usually near the exhaust duct) and test with a multimeter.
Observe: No continuity in the thermal fuse.
Means: Thermal fuse is blown. Replace it.
Next: Replace thermal fuse
Inspect control board
Do: Look for burn marks or damaged components on the control board. Test for continuity if possible.
Observe: Visible damage or no continuity.
Means: Control board is faulty. Replacement needed.
Next: Replace control board
Test door switch
Do: Check the door switch with a multimeter. Ensure it clicks when the door is closed.
Observe: No continuity when door is closed.
Means: Door switch is defective. Replace it.
Next: Replace door switch
Check wiring
Do: Inspect all wiring connections for looseness, corrosion, or damage.
Observe: Loose or damaged wires.
Means: Repair or replace wiring.
Next: Reconnect or replace wires

Cause	Likelihood	Difficulty	Part often needed
Faulty timer switch Timer fails to cut power to the motor at the end of the cycle.	Common	Easy–Medium	Timer switch
Blown thermal fuse Overheating triggers the thermal fuse to open the circuit, but it doesn't reset.	Common	Easy	Thermal fuse
Defective control board Malfunctioning control board sends continuous power to the motor.	Sometimes	Medium	Control board
Failed door switch Door switch not closing properly keeps the motor running.	Sometimes	Easy	Door switch
Loose or damaged wiring Poor connections can cause erratic power flow to the motor.	Sometimes	Easy	Wiring harness
Faulty motor Motor might run continuously if it's shorted internally.	Rare	Hard	Dryer motor

Common parts for 'dryer won't stop running' issues:

Check your dryer model number in the manual to ensure correct part compatibility.

Can I test the dryer without unplugging it?

No, always unplug the dryer before testing to avoid electrical shock.

How do I know if the thermal fuse is blown?

Use a multimeter to test for continuity. No continuity means the fuse is blown and needs replacement.

Is it safe to bypass the thermal fuse temporarily?

No, bypassing the thermal fuse is dangerous and can cause a fire. Always replace it if faulty.

Can a bad door switch cause the dryer to run continuously?

Yes, a faulty door switch can prevent the dryer from recognizing the door is closed, causing it to run non-stop.

What if the timer looks fine but the dryer still runs?

Test other components like the control board or wiring for faults.