Dryer Not Spinning: Why the Drum Stays Still
A dryer that hums but does not turn has a mechanical fault, not an electrical one: the motor is running and something between it and the drum has given up. Five things cause it. A snapped belt, a seized idler pulley, worn drum rollers, a failed motor, or a broken door switch that stops the machine before it starts. A snapped belt is the most common by a wide margin.
What causes it
| Cause | What you see | Who fixes it |
|---|---|---|
| Snapped drive belt | Motor hums, drum turns freely by hand with no resistance at all | Technician |
| Seized idler pulley | A screech before it stopped, or a burning rubber smell | Technician |
| Worn drum rollers | Rumbling for weeks beforehand, drum now stiff or noisy to turn by hand | Technician |
| Failed drive motor | No hum at all, or a hum with a click and nothing else | Technician |
| Door switch or start switch | Nothing happens at all when you press start, no hum, no light | You can test the door |
Four parts turn the drum. Any one of them stops it.
What you can check yourself
- Unplug the dryer, or switch it off at the breaker on a gas machine.
- Open the door and turn the drum by hand. Spinning freely with no resistance means a broken belt. Stiff or grinding means rollers or a seized pulley.
- Press the door switch by hand and listen for a click. No click means the switch, and that alone will stop a dryer from starting.
- Empty the drum and check nothing has fallen behind it. A trainer or a coin wedged between drum and cabinet stops a machine dead.
- Note what you heard before it stopped: a screech points at the idler pulley, a rumble at the rollers, a bang at the belt.
- Do not keep pressing start. A motor straining against a jammed drum overheats, and that turns a belt job into a motor job.
Where to stop
Stop after the door switch. Belts, pulleys, rollers and motors are all behind the front or top panel, and on a gas dryer the burner assembly and gas line sit in the same space. This is a one-visit repair for a technician with the parts on the van.
Call C&C Appliance Repair at (800) 860-0974 for same-day service across Los Angeles and Orange County.
Free, stiff or grinding: the hand test names the part.
One visit when the parts are on the van.
Questions we get asked
The dryer hums but the drum does not move. Is that the belt?
Most likely. Turn the drum by hand with the machine unplugged: if it spins freely with no resistance, the belt has snapped. If it is stiff, the idler pulley or the rollers are the problem instead.
Is a broken dryer belt worth repairing?
Almost always. The belt itself is inexpensive and the job is routine, so on any dryer worth keeping it is a straightforward repair rather than a reason to replace the machine.
It screeched for a week and then stopped turning. What happened?
The idler pulley seized. It is what keeps tension on the belt, and when its bearing fails it screeches first, then locks up and either stops the drum or shreds the belt against it.
Nothing happens at all when I press start. Is that also the belt?
No. A dead machine with no hum is electrical: the door switch, the start switch, the thermal fuse or the power supply. A broken belt still gives you a running motor.
Can I keep using it until you come out?
No, and pressing start repeatedly makes it worse. The motor is loading against something that will not move, and an overheated motor turns an inexpensive repair into an expensive one.
Customer reviews
