Maytag Dryer Making Noise or Won't Spin — 4 Causes & How to Fix

You toss a load of towels in your Maytag dryer, hit start, and instead of the normal hum, you hear a high-pitched squeal that makes you wince. Or worse — the drum just sits there while the motor runs. Your MDE6400AYW or MDE7658AYQ is telling you something's worn out, and nine times out of ten, it's the idler pulley assembly.

The idler pulley (part 6-3700340) keeps tension on your dryer belt. When its bearing seizes or the wheel cracks, you'll hear grinding, squealing, or thumping. If it fails completely, the belt goes slack and your drum won't turn at all.

Quick Symptom Check

Your dryer is likely dealing with a failed idler pulley if you notice:

• High-pitched squealing that starts when the dryer starts
• Grinding or rumbling that gets worse as the cycle continues
• Thumping sound every rotation of the drum
• Drum won't spin but you hear the motor running
• Belt visible on the floor behind or under the dryer
• Intermittent spinning — works sometimes, stops others

Cause #1: Seized Idler Pulley Bearing (Most Likely — 60% of Cases)

The bearing inside the idler pulley wears out from constant friction and heat. When it seizes, the pulley can't rotate smoothly, creating that distinctive metal-on-metal squeal.

How to diagnose: Unplug the dryer, pull off the front panel, and manually spin the idler pulley wheel. If it doesn't spin freely or feels gritty, the bearing's shot. You might see black rubber dust or metal shavings around it.

Probability: If your dryer is squealing consistently during operation, this is your culprit 60% of the time.

The fix: Replace the idler pulley assembly (6-3700340). It's a 20-minute job — remove the belt, pop out the old pulley from its bracket, install the new one, and re-thread the belt. Cost: about $20 for the part.

Cause #2: Cracked or Worn Pulley Wheel (25% of Cases)

Even if the bearing's okay, the plastic or composite wheel itself can crack from years of belt friction. You'll see a chunk missing or a visible crack along the rim.

How to diagnose: Same access as above — visually inspect the wheel. Run your finger along the belt contact area. If you feel a notch, groove, or sharp edge, that's your problem. The belt will slip or catch on that damaged spot, causing thumping or intermittent spinning.

Probability: More common in dryers 7+ years old, especially models like the MDE9706AYW that see heavy use.

The fix: You can't repair a cracked wheel — replace the whole idler pulley assembly. The wheel and bearing are sold as one unit (WP6-3700340).

Cause #3: Stretched or Damaged Drive Belt (10% of Cases)

If your idler pulley looks fine but the drum still won't spin properly, check the belt. A stretched belt won't maintain tension even with a good pulley. Look for fraying, glazing (shiny smooth surface), or cracks.

How to diagnose: With the front panel off, inspect the belt for slack. A good belt should have about 1/2 inch of play when you press on it between the motor pulley and drum. More than that? It's stretched.

The fix: Replace the drive belt. While you're in there with a new idler pulley, spending another $15 on a belt is cheap insurance — they typically wear out together.

Cause #4: Worn Motor Pulley (5% of Cases)

The motor pulley rarely fails, but when it does, it creates symptoms identical to a bad idler. The motor shaft pulley can wear a groove where the belt rides, or loosen on the shaft.

How to diagnose: With the belt removed, inspect the motor pulley for grooves or wobble. Spin it by hand — it should be perfectly centered and tight on the motor shaft.

Probability: Only about 5% of "won't spin" issues. But if you've got a 12+ year old Maytag like the MDE5500AYW, it's worth checking.

The fix: Motor pulley replacement requires removing the motor. Unless you're comfortable with that, call a tech. Cost: $30-50 for the part, $150-200 for professional install.

When to Call a Pro

Be honest about your comfort level. The idler pulley itself? That's a DIY slam dunk if you can handle a screwdriver and remember how the belt routes (take a photo before you remove it). But if you're diagnosing symptoms and finding multiple worn parts — belt, pulley, drum rollers all shot — that's a $300-400 repair. On a 10-year-old dryer, you might be better off replacing the machine.

Call a tech if you hear grinding but can't access the pulley (some Maytag Centennial models require cabinet removal), or if you've replaced the pulley and belt but still have the noise. That points to drum bearings or motor issues, which are more intensive repairs.

What This Repair Actually Costs

DIY parts cost: $20-35 (pulley alone or pulley + belt kit). Professional service call: $120-180 for labor plus parts. Total pro repair: $150-220. The idler pulley itself (6-3700340) runs $19.99 and works across dozens of Maytag, Whirlpool, and Crosley models including MDE4000AYQ, MDE6000AYW, and MDE7400AYW.

Frequently Asked Questions

Can I keep using my dryer if it's squealing?

Technically yes, but you're gambling. A squealing idler is on borrowed time — when it seizes completely, your belt can snap or get thrown off. Then you're dealing with a dryer that won't run at all, usually at the worst possible time. Fix it now while it's a $20 part, not a $200 emergency service call.

How long does an idler pulley typically last?

Expect 8-12 years in normal residential use. Heavy-use households (large families, cloth diapers, gym clothes) might see failure at 5-7 years. The bearing eventually dries out and friction does the rest. If your Maytag is past 8 years and squealing, it's worn out, not defective.

Will a bad idler pulley damage other dryer parts?

Absolutely. A seized pulley creates extra friction on the belt, which overworks the motor and can glaze the drum. I've seen motors burn out because someone ignored a squealing pulley for six months. The motor's pulling against a seized bearing, generating heat, and eventually the motor winding fails. Fix the pulley now, save the motor.