The most common cause is a door that is not fully latched or a door switch that no longer registers it, followed by a tripped breaker or a loose plug. All of these are safe to check in a few minutes. If the door and the power are fine, a blown thermal fuse or a failed start switch is next. Working through the causes below in order will point you toward the real issue fastest.
When a dryer does nothing at all, or hums without turning, it is easy to assume the motor has died. In practice, the cause is often something ordinary, a door that is not quite shut or a breaker that tripped overnight, sitting alongside a few causes that genuinely do need a licensed technician.
Below are the eight causes we see most often, ordered from most to least common, along with the signs that separate one from another and an honest answer on whether it is safe to check yourself.
Jump to a cause
Door not latched or a faulty door switch
Every dryer has a switch that stops the motor whenever the door is open. If the door does not close fully, the latch is worn, or the switch fails, the dryer behaves as if nothing happened when you press Start.
- Nothing happens when you press Start, but the display or lights come on
- You cannot hear the usual click when the door closes
- The door does not stay shut, or a piece of clothing is caught at its edge
- The latch or the catch on the door looks worn or bent
Tripped breaker or blown fuse
Electric dryers run on their own 240-volt circuit with a double breaker, and gas dryers still need a working power supply. A tripped breaker or blown fuse cuts power to the dryer, often after a heavy load or a power surge.
- No lights, no display, and no sound at all
- The breaker handle sits in the middle or in the off position
- The dryer was running a heavy load or a storm hit before it stopped
- Other outlets or appliances on the same circuit are also dead
Loose plug or a dead outlet
Pushing the dryer back, vibration, or a worn cord can loosen the plug just enough to lose power, and a dead outlet gives the same result as a broken dryer.
- The dryer was moved or cleaned behind recently
- The plug feels loose in the outlet, or the cord is bent sharply
- A lamp or tool plugged into the same outlet does not work either
- The display is completely dark
Control lock, child lock, or the wrong cycle
Many dryers have a control lock or a child lock that ignores the buttons, and some need the Start button pressed and held for a second or two. A cycle that was never fully selected can also stop the dryer from starting.
- A lock icon or a lock message shows on the display
- The buttons beep but the drum does not turn
- The problem started after someone cleaned the control panel
- The dryer starts only when Start is held for a moment
Blown thermal fuse
The thermal fuse is a small safety part near the exhaust. If the dryer overheats, usually because of a clogged vent, the fuse blows, and on many models that cuts power to the motor so the dryer will not start.
- The display lights up, but the drum stays silent
- The dryer ran hot or took far too long to dry before it stopped
- The vent duct or the outside hood is clogged with lint
- Nothing changes after the door, the power, and the lock are checked
Failed start switch or control board
The start switch sends the signal to the motor, and on electronic dryers a control board does the same job. When either part fails, the dryer can look perfectly healthy and still never start.
- The buttons feel loose or do not respond when pressed
- The display works or flickers, but the cycle never begins
- The dryer started normally on some days and not on others
- A cycle can be chosen but nothing happens after pressing Start
Broken drive belt
A rubber belt loops around the drum and the motor pulley. When it snaps, the motor may run or hum while the drum stays still, and many dryers also have a belt switch that stops the motor from starting at all.
- You hear the motor hum or run, but the drum does not move
- With the dryer unplugged, the drum spins freely by hand with no resistance
- A burning rubber smell or a thumping noise came before it stopped
- The dryer is several years old and has had heavy use
Failed drive motor or start relay
The motor turns the belt and the blower. If the motor wears out, seizes, or loses the part that helps it start, the dryer can hum, click, or trip the breaker instead of turning.
- A humming or clicking sound for a few seconds, then silence
- The breaker trips as soon as you press Start
- The drum is hard to turn by hand when the dryer is unplugged
- A burning smell comes from the motor area
Not sure which one matches? Start here
Nothing happens: no lights, no sound
- Most likely: breaker or fuse or plug and outlet
- Also check: thermal fuse
The lights come on, but the drum does not move
- Most likely: door switch or control lock
- Also check: thermal fuse and start switch
It hums, but the drum does not turn
- Most likely: drive belt
- Also check: drive motor
Not sure which one it is?
Skip the guesswork. Tell us what you're seeing and a technician will help pin down the cause.
What to check yourself first
These items are safe to check without tools. Press Start after each step to see whether the dryer responds.
Unplug the dryer before touching anything behind or inside it. Electric dryers use 240 volts, so never open the cabinet or the control panel yourself. On a gas dryer, do not strain or disconnect the gas line when moving it, and leave the home and call the gas company right away if you smell gas. If the breaker trips more than once, stop resetting it.
Check the door. Close it firmly, make sure no clothing is caught, and listen for the click of the latch.
Check the control lock. Turn it off, select a cycle again, and hold Start for two or three seconds.
Check the breaker. Switch it fully off and on once, and stop if it trips again.
Check the plug and the outlet. Make sure the plug is pushed in firmly, with no extension cord or adapter.
With the dryer unplugged, turn the drum by hand. If it spins freely with no resistance, suspect the belt.
When to call a professional
Some signs point straight to a licensed technician rather than a DIY fix. Call for service if you notice any of the following:
- A burning smell, smoke, or a plug, cord, or outlet that feels hot or looks discolored
- The breaker trips again right after you reset it
- The motor hums, but the drum does not turn
- The door, the control lock, the breaker, and the plug are fine, but the dryer still will not start
- The dryer is still under manufacturer warranty, since a DIY repair can void it
Revive Appliance Repair handles dryers that will not start for homes and businesses throughout Walnut Creek and the surrounding service area. Our dryer repair service covers diagnosis through completed repair, backed by a 90-day labor warranty.
You may also find these guides useful: troubleshooting a dryer that runs but won't heat and a washer that won't start.