Dryer Drum Not Turning
When your dryer turns on and you hear the motor humming or running, but the drum sits completely still, the most likely culprit is a broken drive belt. The belt wraps around the drum, idler pulley, and motor shaft — when it snaps, the drum simply isn't connected to the motor anymore. You can confirm this instantly: open the door and try to spin the drum by hand. If it spins freely with almost no resistance, the belt is broken. This is a $10–20 part and a beginner-level repair that typically takes 1–2 hours. If the drum won't spin by hand either, the problem is likely worn drum support rollers, drum glides, or — less commonly — a seized motor.
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Common Symptoms
- Dryer turns on and runs but drum doesn't rotate
- You can hear the motor humming but clothes sit still inside
- Drum spins freely with no resistance when you push it by hand
- Loud thump or snap was heard before the problem started
- Dryer produces heat but clothes stay in the same position
- Belt or rubber smell when the dryer is running
Most Likely Causes
- 1
Broken or Worn Drive Belt (Most Common)
The drive belt is a long, thin rubber belt that wraps 360 degrees around the drum, over the idler pulley, and around the motor shaft. Over years of heat cycling and use, it becomes brittle and eventually snaps. When broken, the motor runs freely but the drum has no connection to it. Diagnosis: open the door and push the drum — if it spins with almost no resistance (like a bearing), the belt is broken. A new belt costs $10–20 and is available for every major dryer brand.
- 2
Bad Idler Pulley
The idler pulley maintains tension on the drive belt so it stays wrapped around the drum and motor. If the idler pulley wheel seizes, cracks, or breaks, it either allows the belt to slip off or creates so much friction that the belt snaps. Symptom: the motor hums but the drum doesn't turn, and there may have been a squealing noise before it stopped entirely. Inspect the idler pulley for wobble, cracks, or the bearing feeling rough when spun by hand.
- 3
Worn Drum Support Rollers
Most dryers have two or four rollers that support the drum from below or the rear. When these rollers wear flat or the axles seize, they create so much drag that the motor can't overcome the resistance — the drum stops turning even though the belt is intact. The telltale sign is that the drum is hard or impossible to spin by hand. Rollers are typically replaced as a kit ($15–30) rather than individually.
- 4
Failed Drive Motor
The drive motor spins the drum (via belt) and powers the blower fan. A failed motor may produce a humming sound (the motor is trying to start but can't) or complete silence. If you hear a hum for a few seconds before a click/reset, the motor's start winding has failed. If there's no sound at all, also check the thermal fuse — a blown fuse cuts all power to the motor. Motor replacement is the most expensive DIY repair ($60–150 for the part).
- 5
Broken Drum Glides or Front Bearing
Drum glides (also called drum slides or bearing pads) are small plastic or nylon pieces on the front bulkhead that support the front edge of the drum. When they wear out completely, the drum sags and the metal front ring drags against the bulkhead — creating resistance that can stop rotation. The symptom is that the drum is difficult to spin by hand, especially near the front opening. Glides are a $10–15 fix.
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Quick DIY Checks
Unplug the dryer from the electrical outlet before removing any panels. Electric dryers run at 240V — contact with live terminals can be fatal. Gas dryers: also turn off the gas supply valve at the shutoff behind the unit.
When routing the drive belt around the idler pulley and motor shaft, the idler arm is spring-loaded and under tension. Keep fingers clear of the spring mechanism when releasing or engaging it to avoid a pinch injury.
- 1QUICK BELT DIAGNOSIS: Open the dryer door and push the drum with your hand. If the drum spins easily and freely with almost no resistance — like spinning a wheel — the belt is broken. This is the fastest possible confirmation and takes 5 seconds.
- 2IDENTIFY YOUR ACCESS PANEL (BRAND-SPECIFIC): For Whirlpool, Maytag, Amana, and most Kenmore dryers, the belt is accessed by removing the front panel: release the two spring clips at the top (use a putty knife), then disconnect the door switch wire harness and lift the front panel off. For Samsung and LG dryers, the belt is accessed from the rear panel: remove the screws around the perimeter of the back cover and lift it away from the cabinet.
- 3REMOVE THE DRUM AND INSPECT THE BELT: Once the access panel is off, you'll see the drum sitting on the rollers. Lift the drum slightly and look for the old belt — you'll likely find it lying on the bottom of the cabinet in a heap, or still loosely wrapped around the drum. Remove all pieces of the old belt.
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Try Pro — $7.99/mo- 4INSPECT THE IDLER PULLEY AND ROLLERS: While the drum is out, spin the idler pulley wheel by hand — it should spin smoothly and quietly with no wobble. Inspect each drum roller; they should spin freely and show no flat spots or cracks. Replace any that feel rough or look worn. This is the best time to do preventive roller replacement even if they look okay — they'll wear out soon anyway.
- 5INSTALL THE NEW BELT: Drape the new belt around the drum with the ribbed/grooved side facing the drum surface. Reassemble the drum into the cabinet on the rollers. Route the belt around the idler pulley (creating a Z-shape or triangle loop: belt from drum goes around the idler pulley, then around the motor shaft). Pull the idler pulley tension arm toward the motor shaft to create slack, loop the belt around the motor shaft, then release the idler arm — it will spring back and create tension.
- 6TEST BEFORE REASSEMBLY: Before reinstalling the access panel, plug the dryer back in and run a short cycle. Confirm the drum spins smoothly. Check that the belt tracks evenly on the drum and doesn't slip. Listen for any new squealing that would indicate the idler pulley or rollers need attention. Unplug again before reinstalling the panel.
- 7MOTOR / NO-SOUND DIAGNOSIS: If the dryer is completely silent when you press Start — no hum, no fan, nothing — also check the thermal fuse before replacing the motor. A blown thermal fuse cuts all power. The fuse is on the exhaust duct inside the rear panel (most brands) and can be tested with a multimeter (should show continuity). A blown fuse costs $10 to replace; a motor costs $60–150.
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Repair vs Replace
A broken belt or worn rollers are among the cheapest dryer repairs possible — parts are $10–30 and the job is beginner-to-moderate DIY. Even a motor replacement ($60–150 in parts) is worth doing on a dryer under 10 years old. Only consider replacing the dryer if the motor has failed AND the drum bearing is worn AND the unit is over 12 years old — multiple simultaneous failures in an older unit signal end-of-life.
Est. Repair Cost
$10–$50 in parts (DIY)
Est. Replacement Cost
$600–$1,200 for a new dryer
Recommended Tools & Parts
- Buy on Amazon →
Dryer Drive Belt
Ribbed rubber belt that loops around the drum, idler pulley, and motor shaft. Brand/model-specific. Common OEM part numbers: WPW10205415 (Whirlpool/Maytag), DC47-00001A area (Samsung — verify model), 4400EL2001C (LG), WE12M29 (GE).
$10–$20
- Buy on Amazon →
Drum Support Roller Kit
Set of 2 or 4 drum support rollers with axles and washers. Replace as a complete kit — if one is worn, the others are close behind. Most brands use a two-roller rear-mount design.
$15–$35
- Buy on Amazon →
Idler Pulley Assembly
Tension pulley that keeps the drive belt taut. Includes the wheel, bracket, and mounting hardware on most kits. Often sold as a belt + idler pulley combo kit for a complete repair.
$12–$25
- Buy on Amazon →
Drum Glide Kit (Front Bearing Pads)
Plastic or nylon slide pads that support the front edge of the drum. Prevents drum from dragging on the front bulkhead. Often includes the front drum seal/felt as well.
$10–$20
- Buy on Amazon →
Thermal Fuse
One-time safety fuse on the exhaust duct. If the dryer won't start at all (complete silence), check this first before replacing the motor. Costs $8–15 and takes 15 minutes to replace.
$8–$15
Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.
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Frequently Asked Questions
- How do I know if the belt is broken or if the motor has failed?
- The quickest test: open the door and push the drum by hand. If it spins freely with almost no resistance, the belt is broken — the motor has nothing to push against, so spinning by hand feels effortless. If the motor hums for a few seconds when you press Start, the motor is trying to run but can't (bad start capacitor or seized motor). If there's complete silence — no hum, no fan — check the thermal fuse first (it cuts all power when blown). A dead-silent dryer with a good fuse points to motor failure or a failed door switch.
- What's the difference between accessing from the front vs. rear panel?
- Whirlpool, Maytag, and most Kenmore dryers use front-panel removal to access the belt and drum. You'll release two spring clips at the top of the front panel with a putty knife, then disconnect the door switch harness. Samsung and LG dryers typically use rear-panel removal — you unscrew the back cover perimeter screws and lift the panel off. GE and Frigidaire vary by model year. Always look up your specific model number on a parts site (like RepairClinic or AppliancePartsPros) before starting — the parts diagram will show you clearly which access method applies.
- Should I replace just the belt, or the rollers and idler pulley at the same time?
- If the dryer is 5+ years old and you're already replacing the belt, strongly consider doing a full drum kit replacement — belt, rollers, and idler pulley together. The parts together cost $30–50, and the labor is the same whether you replace one part or all three (you've already disassembled everything). Rollers and the idler pulley that have been running for years alongside the broken belt are likely at the end of their own lifespan. Doing them all at once prevents a second repair in 6–12 months.
- My Whirlpool/Maytag dryer belt — is there a specific routing pattern I need to follow?
- Yes. For most Whirlpool/Maytag dryers, the belt routes as follows: the ribbed side faces the drum. Looking from the front with the drum removed, the belt wraps around the drum, then goes around the idler pulley (the small wheel on the spring-loaded arm), and finally around the motor shaft. The idler pulley sits between the drum and the motor — pull the idler arm back toward the motor to create enough slack to loop the belt onto the motor shaft, then release the arm. The belt should form a rough Z or triangle shape from drum to idler to motor. RepairClinic has free video guides for specific model numbers if you want visual confirmation.
- How long do dryer drive belts typically last?
- Most dryer belts last 8–12 years under normal use. Factors that shorten belt life: consistently overloaded drum (too much weight strains the belt), running with worn rollers that create extra resistance and belt flex, very frequent use (multiple loads per day), and heat damage from restricted venting. A belt that snaps prematurely (under 5 years) usually indicates another problem — worn rollers dragging, a seized idler pulley, or an overloaded drum — that should be addressed alongside the belt replacement.