When your dryer is not spinning but heating, it is telling you something specific: the heat circuit works, but the part that turns the drum has failed. That narrows the problem to a handful of mechanical culprits — almost always a broken belt, a seized roller, a worn idler pulley, or a motor issue. The good news is that most of these are affordable DIY repairs. Before you touch anything, unplug the dryer.
- First: Confirm What You Are Seeing
- Cause 1: A Broken Drive Belt (Most Common)
- Cause 2: Worn or Seized Drum Rollers
- Cause 3: A Failed Idler Pulley or Tensioner
- Cause 4: A Bad Motor or Motor Coupling
- A Quick Diagnostic Sequence
- Tools and Parts You Will Need
- What About the Drum Glides and Bearings?
- How to Avoid a Repeat Failure
- When to Call a Pro
- The Bottom Line
First: Confirm What You Are Seeing
Start the dryer, wait 20 seconds, then open the door. If the drum has not moved but the interior is warm, you have the classic no-spin/heat-works fault. Also listen: a humming motor that will not turn the drum points one direction, while a normal motor sound with a still drum points another. And do a quick sanity check — some dryers have an easy-to-bump “wrinkle guard” or a door switch that can mimic a no-start. But if it heats and the motor runs, the mechanical drive is the issue.
Unplug the dryer before any inspection or repair. For a gas dryer, also close the gas shutoff valve. You are working near a 240-volt circuit and a spinning motor; power off is non-negotiable.
Cause 1: A Broken Drive Belt (Most Common)
The number-one reason a dryer heats but will not spin is a snapped drive belt. This thin, roughly 90-inch rubber belt wraps around the drum, loops around the idler pulley, and hooks onto the motor shaft. When it breaks or slips off, the motor spins freely and the heater still fires, but the drum sits dead.
The tell: reach in and turn the drum by hand. If it spins with almost no resistance and flops freely, the belt is broken. A healthy belt gives noticeable drag.
The fix: A replacement belt runs $10 to $30. You open the top or front panel (model-dependent), route the new belt around the drum in the same groove, then loop it around the idler pulley and motor pulley in the correct path — this is the step people get wrong, so photograph the routing before removing the old belt or check a diagram for your model number. Plan on 45 to 90 minutes for a first-timer.
Cause 2: Worn or Seized Drum Rollers
The drum rides on two to four support rollers (also called drum wheels). Over years these wear flat, their bearings dry out, or they seize entirely. A seized roller can jam the drum so the belt slips or the motor cannot overcome the friction — you may hear a loud thumping or grinding right before it stopped spinning.
The tell: with the belt off, spin each roller by hand. Good rollers turn smoothly and quietly. A bad one wobbles, grinds, or will not turn.
The fix: Roller kits cost $15 to $40 and typically include new tri-rings or clips. Replace rollers in pairs or as a full set so wear stays even. Add a drop of appliance-safe oil only if the manufacturer specifies it; most modern rollers are sealed.
Cause 3: A Failed Idler Pulley or Tensioner
The idler pulley keeps tension on the drive belt so it grips the motor. Its bearing can wear out or seize. When the idler fails, the belt loses tension and slips, or the extra drag stalls the drum even though the motor runs and the heater works.
The tell: spin the idler pulley by hand. It should rotate freely and quietly. Grinding, squealing, or a wobble means replace it. A squealing dryer that then stops spinning often traced back to the idler.
The fix: Idler pulleys run $10 to $25 and are usually swapped at the same time as the belt, since you already have the machine open and the belt off. Doing belt and idler together is cheap insurance.
Cause 4: A Bad Motor or Motor Coupling
If the belt is intact, the rollers turn freely, and the idler is fine, look at the motor. Two failure modes cause heat-but-no-spin:
- Seized or humming motor: a worn motor bearing can seize the shaft. You will often hear a hum for a few seconds before the machine’s overload trips. The drum will not turn even with the belt off and everything else clear.
- Bad start winding or start switch: the motor buzzes but cannot get moving.
The tell: with the belt removed, try to spin the motor pulley by hand (power still off). It should turn. If it is locked, the motor is seized. A humming motor that will not start also points here.
The fix: A dryer drive motor costs $80 to $200 plus labor, making it the priciest of these repairs. On a dryer older than 10 to 12 years, weigh the motor cost against the roughly $500 to $900 price of a new dryer. Sometimes replacement is the smarter call.
A Quick Diagnostic Sequence
Work through it in this order, dryer unplugged and panel open:
- Spin the drum by hand. Free and floppy with no drag equals broken belt.
- Inspect the belt path. Snapped, cracked, or off the pulley confirms it.
- Spin each drum roller. Grinding or seized means replace the rollers.
- Spin the idler pulley. Noisy or stiff means replace it.
- Try to turn the motor pulley. Locked or humming-only means motor.
Most of the time you will stop at step 1 or 2. The belt is by far the most common answer, followed by rollers and the idler.
Tools and Parts You Will Need
- Nut driver set (usually 1/4-inch and 5/16-inch)
- Putty knife or panel-release tool to pop the top/front
- Phillips screwdriver
- Work gloves and a flashlight
- The correct belt, roller kit, and/or idler pulley for your exact model number (found on the door frame or inside the door)
Ordering parts by model number matters — belt lengths and roller styles vary between Whirlpool, GE, LG, Samsung, and Maytag platforms.
What About the Drum Glides and Bearings?
On many front-panel dryers, the drum also rides on plastic glides or slides at the front and a rear drum bearing or shaft at the back. These wear just like the rollers. When front glides wear down to nothing, the drum drags on metal, and the added friction can stall it or cause a loud scraping that precedes a no-spin condition. A rear bearing that seizes does the same thing from the back. Both are inexpensive parts — glides run $10 to $20 a set, a rear bearing kit $15 to $40 — and they are worth inspecting whenever you have the cabinet open for a belt or roller job. Spin the drum by hand with the belt off and feel for scraping or resistance at the front and rear; smooth and quiet means they are fine, grinding means replace them.
How to Avoid a Repeat Failure
Once you have the drum spinning again, a few habits extend the life of the new parts:
- Don’t overload the dryer. Cramming heavy, wet loads strains the belt, rollers, and motor. Dry in reasonable batches.
- Clean the lint filter every load and the exhaust vent yearly — a clogged vent overheats the whole drive area and hardens the belt.
- Level the machine so the drum load is even and the rollers wear evenly.
- Listen for early warnings. Squealing or thumping is the belt, idler, or rollers telling you they are wearing — fix it before it snaps.
- Replace wear parts as a set. When you do the belt, do the idler and inspect the rollers; it is cheap insurance while the machine is open.
When to Call a Pro
Handle the belt, rollers, and idler yourself; they are forgiving repairs and the parts are cheap. Bring in an appliance tech if the motor is seized, if the dryer is a stacked or front-load combo that is awkward to open, or if you are not comfortable working inside the cabinet. A service call runs $100 to $150, with total motor jobs landing around $200 to $400. For a gas dryer, never bypass the gas shutoff step, and leave any gas-valve or burner work to a qualified technician.
The Bottom Line
A dryer that heats but will not spin is a mechanical drive failure, not an electrical one — which is actually the easy kind to fix. Nine times out of ten it is a $10 to $30 belt you can replace in an hour, or a set of rollers and an idler pulley for a bit more. Unplug first, work through the five-step check, order parts by your model number, and you will have the drum turning again for a fraction of a service call.
