AEG Dryer Not Spinning or Making Squealing Noise — 5 Belt Tension Roller Issues & Fixes

You toss wet clothes into your AEG LTH57800 dryer, hit start, and hear the motor running — but the drum just sits there. Or maybe it's spinning, but now there's this high-pitched squeal that wasn't there last week. Nine times out of ten, the culprit hiding behind your front panel is a worn-out belt tension roller that's finally given up.

The belt tension roller (also called a jockey pulley) does exactly what it sounds like: it keeps constant pressure on the dryer belt so your drum spins smoothly. When it wears out, the belt either slips off completely or starts rubbing metal-on-metal. The good news? This is one of the most straightforward dryer repairs you can tackle yourself.

Quick Symptom Check

Your AEG, Electrolux, or Zanussi dryer is showing belt tension roller failure if you notice:

• Drum won't turn — Motor runs but drum stays still, even when you spin it by hand and let go
• Squealing or squeaking during operation — High-pitched noise that changes with drum speed
• Thumping sound — Rhythmic knocking as the drum tries to rotate
• Belt visible inside drum — You can see the belt through the door or it's fallen completely off
• Drum spins too freely — When you rotate it by hand, there's no resistance at all
• Intermittent spinning — Drum stops and starts randomly during the cycle

Cause #1: Worn or Seized Bearing in Tension Roller (75% of Cases)

The bearing inside your tension roller eventually wears out from thousands of hours of continuous friction. When it does, the roller either stops spinning freely or develops significant play.

How to diagnose: Unplug the dryer and remove the top or front panel (depends on your model). Locate the tension roller — it's the small wheel that the belt wraps around, usually spring-loaded against the belt. Try to spin it with your finger. A good roller spins smoothly and quietly. A bad one either won't spin at all, makes grinding noises, or wobbles noticeably side-to-side.

Why it happens: Normal wear and tear. The LTH-series AEG dryers and EDC-series Electrolux models typically need this part replaced every 5-8 years depending on usage.

The fix: Replace the tension roller with part number 1250125034. This roller fits dozens of models including the LTH55800, LTH57810, LTH58810, EDC2096GDW, EDC46100W, and EDC47100W. You'll likely need to remove the belt first, swap the roller, then reinstall the belt around the drum, motor pulley, and new roller. Takes about 30-45 minutes once you've got the panel off.

Cost: $15.99 for the roller. Professional repair runs $150-$220 with the service call.

Cause #2: Cracked or Broken Roller Wheel (15% of Cases)

Sometimes the plastic or rubber wheel itself cracks, especially if something got caught in the belt or if the dryer took a hard bump during a move.

How to diagnose: With the panel off, inspect the roller wheel carefully. Look for visible cracks, chunks missing from the wheel, or flat spots where it's worn unevenly. If you see any damage to the wheel surface, it needs replacement even if the bearing still spins.

The fix: Same replacement process as above. The 1250125034 roller assembly includes the wheel and bearing together, so you're replacing the entire unit.

Cause #3: Weakened or Broken Tension Spring (5% of Cases)

The tension roller doesn't just sit there — it's pushed against the belt by a spring that maintains constant pressure. If that spring breaks or stretches out, the roller can't keep the belt tight.

How to diagnose: Look at the spring attached to the tension roller arm. It should pull the roller firmly against the belt path. If you can easily push the roller away from where the belt sits with light finger pressure, the spring's too weak. If the spring is detached or broken, it's obvious.

The fix: Some roller assemblies include the spring, but often you need to order it separately. Check your specific model's parts diagram. The roller itself might be fine — you may only need the spring.

Cause #4: Belt Worn Smooth or Stretched (3% of Cases)

Sometimes it's not the roller at all. If your dryer belt has worn smooth or stretched significantly, it'll slip even with a perfectly good tension roller.

How to diagnose: Remove the belt and inspect its inner surface (the side that contacts the drum). It should have a grippy texture. If it's shiny and smooth like a tire with no tread, or if you can stretch it more than an inch or two by hand, it needs replacement.

The fix: Since you're already in there replacing the tension roller, now's the perfect time to throw on a new belt too. You'll find compatible belt part numbers in your model's parts diagram.

Cause #5: Misaligned Idler Pulley Bracket (2% of Cases)

On some models, the bracket that holds the tension roller can bend or come loose, preventing the roller from maintaining proper belt alignment.

How to diagnose: With the belt off, check that the tension roller arm moves freely and returns to its proper position. The roller should align with the belt path — if it's twisted or sitting at an odd angle, the bracket's bent or the mounting is loose.

The fix: Try tightening the mounting hardware first. If the bracket itself is bent, you can sometimes carefully bend it back into position, but replacement is more reliable.

When to Call a Pro

This is honestly a pretty DIY-friendly repair if you're comfortable with basic tools. However, call a technician if:

• You've replaced the tension roller but the drum still won't spin properly
• The motor itself isn't running at all (that's a different problem)
• Your dryer is still under warranty
• You see burned wires or smell electrical burning
• The drum shaft itself looks damaged or bent

The tension roller replacement is straightforward, but diagnosing other drive system problems requires more experience.

Frequently Asked Questions

How long should a dryer belt tension roller last?

Typically 5-8 years with normal residential use. If you run your dryer daily or do large loads constantly, you might see failure closer to 4-5 years. Commercial or heavy-use environments can wear them out in 2-3 years.

Can I run my dryer with a bad tension roller temporarily?

No, don't try it. If the roller's seized, running the dryer will burn out the belt within minutes or overheat the motor. If the roller's broken and the belt has come off, the drum won't spin at all and you'll just be running the motor and heater with clothes sitting wet inside — potential fire hazard.

Will the wrong tension roller damage my dryer?

Yes. Using an incorrect roller diameter or width throws off belt alignment and tension. The 1250125034 is specifically designed for AEG LTH-series, Electrolux EDC-series, and compatible Zanussi models. It replaces original part numbers 1250125000, 1250125109, and 8581250125037. Always verify your model number against the compatibility list before ordering.