Dryer Keeps Running When the Door Is Open? Causes and Safe Fixes

Switch the dryer off and unplug it now. A dryer that keeps running with the door open usually has a bad door switch or a dirty latch, and sometimes a worn timer or a start switch that sticks. Clean the latch, check settings like wrinkle prevent, clean the moisture sensor bars, and have the door switch tested. Never tape or bypass the switch.

You open the door to check the load and the drum keeps spinning. Or the dryer does not stop at the end of the cycle and keeps tumbling until you open the door. A spinning drum with the door open is a hazard to hands, children and pets, and it throws lint into the room.

This guide explains the likely causes in the order repair sources give, from simple settings to parts. It draws on appliance repair guides and forum technicians. Dryers differ by brand and age, so check your manual and model number before you replace anything.

Safety first

• Unplug the dryer. For a gas dryer, also shut the gas valve if you need to pull the machine out.
• Keep children and pets away. A moving drum can trap or injure.
• Do not reach into the drum or the cabinet while it is plugged in.
• Lint and dust can float into the air with the door open and become a fire risk, so clean up any lint you see before you run the dryer again.

Two symptoms that look alike

Step 1: Check the settings

The easiest cause is a setting. Look at the control panel.

• Wrinkle prevent or similar. This option can make the dryer continue to tumble until the door opens. Turn it off and see whether the behavior stops.
• Cycle type. An auto-dry cycle relies on sensors. A timed cycle relies on the timer.
• End-of-cycle signal and "extended tumble." Some dryers tumble periodically after the cycle ends. Check your manual.

If turning off the option fixes it, nothing is wrong with the dryer.

Step 2: Clean the door latch and strike

The door switch is pressed by the door latch or catch. A dirty or worn latch can fail to release the switch.

1. Unplug the dryer.
2. Look at the door catch and the opening it clicks into. Remove lint, dust or a bit of dried softener.
3. Wipe with a damp cloth and dry it.
4. Check that the door closes firmly and opens fully. A bent or worn catch can keep the switch pressed even when the door is open.

A guide on repairs calls this a common problem that is typically either a faulty door switch or a dirty door latch.

Step 3: Test the door switch

The door switch cuts power to the motor when the door opens. If it stays closed, the dryer keeps running.

• With the dryer unplugged, access the switch (usually behind the front panel or near the door frame; see your manual).
• Test it for continuity with a multimeter. A repair source says testing it this way can confirm whether it needs replacing.
• If it shows continuity when the door is open, replace it with the exact part for your model.

If you are not comfortable working inside the cabinet, call a technician. The part is usually inexpensive, and the repair is short.

Step 4: Clean the moisture sensor bars

Auto-dry cycles use metal strips inside the drum to judge how wet the clothes are. Fabric softener and dryer sheets can leave a film that makes the dryer think the load is never dry, so it never ends the cycle.

1. Unplug the dryer.
2. Find the two metal strips inside the drum, usually near the door opening.
3. Wipe them with a soft cloth and warm soapy water, or a little rubbing alcohol, and dry them.
4. Repeat every few months if you use softener.

A repair source says cleaning the sensor bars with warm soapy water can restore their function.

Step 5: Suspect the timer

On older dryers with a mechanical timer dial, a failed timer motor can stop the dial from advancing. The dryer then runs indefinitely on a timed cycle. Several forum posts describe this as a worn timer. Replacing the timer is a technician job on most models.

Step 6: A stuck start switch or relay

On some older models, a stuck push-to-start switch or a stuck relay can restart the drum as soon as the door closes. If the dryer restarts every time you shut the door without pressing Start, mention that to the technician. It points to this part.

What it is not

A dryer that overheats, smells like burning or turns off partway has different causes. See why a dryer blows its thermal fuse or why a dryer smells. If your clothes simply take too long to dry, see slow drying times.

When to call a technician

Call an appliance technician if:

• The drum runs with the door open and you cannot find a setting or dirty latch.
• The door switch tests bad and you are not comfortable replacing it.
• The dryer restarts by itself.
• You smell burning or see sparks.
• The dryer is old and several parts are worn.

Tell them the make and model, whether it is gas or electric, and exactly what happens when you open the door.

Repair or replace?

Ask for a written estimate and compare it with the price of a new dryer.

What not to do

• Do not tape the door switch or hold it down.
• Do not run the dryer with the door open to finish a load.
• Do not reach into the drum while it is plugged in.
• Do not ignore lint that has spread into the room.
• Do not ignore a restart without pressing Start.

Which fix fits your situation?

• Drum spins with the door open: unplug it, clean the latch, test the door switch.
• It never stops at the end of a cycle: check wrinkle prevent, clean the sensor bars, then look at the timer.
• It restarts when you close the door: stuck start switch or relay.
• Everything looks fine but it still happens: call a technician.

Bottom line

A dryer that runs with the door open is a safety problem. Unplug it first. Check settings like wrinkle prevent, clean the door latch and the sensor bars, and have the door switch and timer tested. Never bypass the switch, and call a technician for anything you cannot test safely.