Quick answer
If your dryer isn't rotating, first unplug it and check the belt for damage or looseness. If the belt is intact, test the motor and idler pulley. Replace worn parts as needed.
Confirm the symptom
- Drum spins when pushed manually
- No power to the dryer
- Dryer makes noise but drum doesn't turn
- Dryer runs but drum stays still
- Belt looks broken or loose
Tools and prep
- Plug-rated screwdrivers
- Socket set
- Flashlight
- Replacement belt (if needed)
- Work gloves
- Turn off power at circuit breaker
Step-by-step troubleshooting
- Unplug DryerDo: Disconnect the dryer from the power source.Observe: Dryer is completely powered off.Means: Ensures safety during inspection.Next: Check Belt
- Check BeltDo: Remove the back panel and inspect the belt for breaks or looseness.Observe: Belt is intact and properly tensioned.Means: A broken or loose belt prevents drum rotation.Next: Test Motor
- Test MotorDo: Use a multimeter to test the motor for continuity.Observe: Motor shows no continuity or unusual resistance.Means: A faulty motor may need replacement.Next: Inspect Idler Pulley
- Inspect Idler PulleyDo: Check the idler pulley for wear or damage. Spin it to ensure it moves freely.Observe: Pulley is worn or doesn't spin smoothly.Means: A faulty idler pulley can prevent belt tension.Next: Check Drum Rollers
- Check Drum RollersDo: Inspect rollers for damage or misalignment.Observe: Rollers are damaged or not aligned.Means: Damaged rollers can stop drum rotation.Next: Reassemble and Test
- Reassemble and TestDo: Reinstall panels and reconnect power. Test the dryer.Observe: Drum rotates smoothly during operation.Means: Issue resolved with repairs.Next: Done
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Broken or loose belt The belt drives the drum; if broken or loose, the drum won't turn. | Common | Easy | Dryer belt |
| Faulty motor A failed motor can't drive the drum or belt. | Sometimes | Medium | Dryer motor |
| Worn idler pulley The pulley maintains belt tension; wear can cause slippage. | Common | Easy–Medium | Idler pulley |
| Damaged drum rollers Rollers support the drum; damage can prevent rotation. | Sometimes | Medium | Drum rollers |
| Faulty start switch A bad switch may prevent motor activation. | Rare | Easy | Start switch |
| Blocked vent or lint buildup Excessive lint can overload the motor. | Rare | Easy | Vent cleaning |
Parts matching
Common parts needed for a dryer not rotating:
- Dryer belt (common replacement)
- Idler pulley (common replacement)
- Drum rollers (sometimes needed)
- Dryer motor (sometimes needed)
- Start switch (rarely needed)
Purchase OEM or high-quality aftermarket parts for compatibility and durability.
When to call a professional
- Dryer emits burning smell during testing
- You hear a loud grinding noise from the motor
- Drum is misaligned or damaged beyond simple repair
- Electrical issues like tripped breakers persist after inspection
- Uncertain about diagnosing electrical components safely
FAQ
How often should I replace a dryer belt?
Replace the belt every 5–10 years or if it shows signs of wear, stretching, or breaks.
Can I run the dryer without a belt?
No, the belt is essential for drum rotation. Running without it will damage the motor.
Why does my dryer make noise but not spin?
A worn motor, idler pulley, or belt slippage can cause noise without rotation. Check these components.
How do I know if the dryer motor is bad?
If the motor doesn't hum or spin when powered, or if it smells burnt, it likely needs replacement.
Can lint buildup cause a dryer to stop rotating?
Yes, excessive lint can overload the motor, but this is rare. Clean vents regularly to prevent this.