Symptoms
- Dryer keeps tumbling well past the set cycle time
- Turning the dial or pressing stop doesn't end the cycle
- Dryer only stops when unplugged or breaker is shut off
- Heat continues even after the timer should have ended it
Likely causes
- CommonStuck timer contacts (mechanical models)Worn or fused contacts inside the timer can keep the circuit powered even after the set time elapses.
- PossibleStuck relay on the control board (electronic models)A relay that fails in the closed position keeps sending power to the motor or heater.
- PossibleMoisture sensor or timer circuit malfunction on auto-dry settingsA faulty sensor can prevent the control from recognizing the load is dry and ending the cycle.
- Less commonDoor switch or start switch stuck in the run positionA physically stuck switch can keep the circuit engaged regardless of timer settings.
What to do
- If the dryer won't stop when you press stop or open the door, unplug it or shut off the breaker immediately.
- Do not leave a dryer running unattended if it won't respond to normal stop controls.
- Once stopped, try starting a short timed cycle and watch closely to see if it ends on schedule.
- Check that the start and door switches move freely and aren't physically stuck.
- For mechanical timer models, this often indicates worn timer contacts that need replacement.
- For electronic models, this can indicate a stuck relay on the control board that needs professional diagnosis.
- Do not continue using the dryer unattended until the issue is fixed, since a stuck-on heater is a fire risk.
Tools and parts
Dryer timer assemblySearch: “dryer timer replacement”
Dryer control boardSearch: “dryer electronic control board”
When to call a pro
A dryer that won't stop on command should be serviced by an appliance technician before further use, since it points to a stuck timer or relay.
Safety
Use caution
A dryer that won't shut off is a fire risk; unplug it or shut off the breaker immediately and don't run it again until repaired.