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Quick answer
Do not keep running the AEG T8DEK945E after the belt has come off again following a reinstallation. AEG says to stop using a damaged tumble dryer, disconnect it before belt maintenance, use a compatible part for the intended product, and use an authorised service route when the fault is not resolved. Leave the dryer upright and unplugged, record the exact model and PNC 91609802800 from the rating plate, photograph any belt wear or visible damage without removing panels, and tell the technician that the belt was reinstalled and then slipped off again. Do not choose a belt by appearance or repeat a belt installation without identifying the reason it loses tracking.
Work through in order
Diagnostic checks
Use only checks that match the exact appliance or system and its official guide.
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Check 1
Stop the dryer and disconnect the mains plug before any further inspection. Leave the appliance standing upright and do not start another cycle after the belt has slipped off again.
Expected result: The belt has come off repeatedly, the drum no longer turns normally, there is rubbing or a burning smell, or any panel or component is visibly damaged.
Next step: Keep the dryer unplugged and arrange an authorised service inspection. Do not continue operation to see whether the belt will stay on.
Why this matters
Why: The dryer has an unresolved mechanical or safety condition. The symptom does not identify whether the belt, tensioning system, drum support, motor or another part is responsible.
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Check 2
Read and record the complete rating-plate information, including model code T8DEK945E and PNC 91609802800, without removing any cover. Use those identifiers to retrieve the AEG manual and give them to the service centre.
Expected result: The rating plate confirms T8DEK945E/91609802800, or the visible label differs or is incomplete.
Next step: If the label differs, pause and use the actual model/PNC for support. If it matches, attach the information to the service request and do not order a belt from a generic listing.
Why this matters
Why: The confirmed model and PNC determine which documentation and parts route applies. An incomplete or different label means the assigned model cannot be assumed for a repair part.
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Check 3
Without opening the cabinet or moving the dryer onto a side, document the repeat failure: when the belt first came off, what was observed after it was reinstalled, whether the belt shows fraying or missing material, and any unusual noise or drum movement. Take photos of visible damage and keep any loose belt or fragments for the technician.
Expected result: The belt is visibly worn or damaged, the same slipping recurs, or there is no visible damage but the drum or motor behavior was abnormal before stopping.
Next step: Include the timeline and photos in the repair request. Do not remove panels, adjust a spring, tighten a motor, or reinstall the belt again as a home test.
Why this matters
Why: These observations help the technician reproduce and scope the fault, but they do not prove which component caused the belt to leave its path.
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Check 4
Request an authorised AEG service inspection and state that the drive belt slipped off, was reinstalled, and slipped off again on model T8DEK945E. Ask the technician to verify the complete drive path and the model-specific repair documentation before installing any replacement.
Expected result: The service route can match the model/PNC, or the provider asks for a different model, PNC or additional identification.
Next step: Provide the rating-plate details and photos. Keep the dryer disconnected until the inspection is complete; do not accept a generic belt match as proof of compatibility.
Why this matters
Why: AEG's repair guidance places diagnosis and safe repair with an authorised engineer when the fault persists; a request for more identification means model scope is not yet confirmed.
Use your observations
Decision map
Find the observation that best matches what you see, then follow the next safe action.
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PATH 01Next step
What you see
The belt slipped off again after it had been reinstalled.
Do this next
Stop using the dryer, unplug it, record the repeat timeline and arrange authorised service. Do not reinstall the belt again as a test.
Why this path and its safety boundary
Why it matters: The first reinstallation did not resolve the cause, and continued cycling could worsen damage or create a safety risk.
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PATH 02Next step
What you see
The belt is frayed, cut, stretched, missing material, or another visible component is damaged.
Do this next
Keep the dryer unplugged and provide photos and the exact model/PNC to an authorised service centre. Do not select a replacement by appearance.
Why this path and its safety boundary
Why it matters: AEG says not to use a damaged appliance or damaged repair product; the visible damage does not by itself identify the full drive fault.
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PATH 03Next step
What you see
The rating plate does not clearly show T8DEK945E or PNC 91609802800.
Do this next
Use the actual model code and PNC with AEG's manual lookup and service route before discussing a belt or any internal repair.
Why this path and its safety boundary
Why it matters: The assigned model scope cannot be assumed for a part or repair procedure.
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PATH 04Next step
What you see
Continuing would require opening panels, releasing a spring, moving the drum, handling wiring, or working around sharp edges or stored mechanical tension.
Do this next
Do not proceed with home disassembly; keep the dryer unplugged and use an authorised engineer with the correct model documentation.
Why this path and its safety boundary
Why it matters: AEG identifies electric shock, injury and pinch risks for belt work and warns that nonprofessional repair can have safety consequences.
Helpful context
Understand the symptom
A belt that slips again is a stop condition
The assigned symptom includes a belt that was put back on and then slipped off again. That recurrence should not be treated as a successful repair or a reason to keep testing cycles. The belt may be damaged, or another drive or support condition may be involved, but the public AEG material does not provide a T8DEK945E-specific diagnosis from the symptom alone. Keep the dryer out of service and give the repeat failure to an authorised technician.
Use the model and PNC before any part discussion
AEG's exact model page lists T8DEK945E and PNC 91609802800, while its manual system asks for the model code or PNC to retrieve documentation. A belt that looks similar is not enough to establish compatibility, and the model page itself requires the PNC for compatible spares. The safe handoff is therefore model-and-PNC based rather than a visual belt match.
When checks do not resolve it
Need a professional?
Use an authorised AEG service centre when the belt slips off repeatedly, the belt or drive path is visibly damaged, the drum no longer turns normally, or any further step would require panel removal, spring release, wiring access or internal adjustment. Supply model T8DEK945E, PNC 91609802800, the repeat-slip timeline and photos.
Common questions
FAQ
Should I reinstall the AEG T8DEK945E belt one more time?
No. Because it slipped off again after reinstallation, keep the dryer unplugged and arrange service. Repeating the installation without identifying why the belt loses tracking can cause further damage and exposes you to belt, spring, sharp-edge and electrical hazards.
What information should I give the AEG technician?
Give the full model code T8DEK945E, PNC 91609802800, the fact that the belt came off and then slipped again after reinstallation, any visible wear, and photos of damage. AEG's model page and manual lookup use the model/PNC to scope documentation and support.
Can I use a belt that looks the same from another AEG dryer?
Do not assume that appearance proves compatibility. AEG says to verify compatibility for the intended product, and the T8DEK945E parts page requires the PNC for compatible spares. Use the exact rating-plate information and the authorised service route.
Read the exact guide
Official sources
- Model T8DEK945E - Spares & Accessories - AEGAEG · Exact assigned model identity. The page lists T8DEK945E and PNC version 91609802800, and says compatible spares require the PNC; it does not authorize a user belt installation or identify the cause of repeated slipping.
- Tumble dryer - How to replace drive belt (2)AEG · Used only for the safety boundary: disconnect power, use compatible parts, recognise belt pinch/electric-shock risks, and avoid nonprofessional repair. No panel-removal or belt-installation steps are reproduced.
- Tumble dryer does not start / does not workAEG · Supports the no-rotation symptom as a service case when external checks do not resolve it and warns to unplug until fixed; it does not identify the cause of a slipping belt.
- Download User Manuals - Support | AEGAEG · Supports obtaining exact-model documentation and reading the rating plate; it does not supply a belt diagnosis or universal repair procedure.
- Tumble Dryer Has Visible Damage - What to DoAEG · Supports stopping use, not connecting or using a damaged dryer, documenting the damage, and obtaining an authorised inspection; it does not diagnose the T8DEK945E drive path.
- Safety risks all products | AEGAEG · Supports the professional-service boundary for internal dryer work; it does not establish a T8DEK945E-specific component diagnosis.
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