AEG Dryer Error E40
⚡ Quick Answer: The AEG dryer E40 error code indicates a malfunction in the door lock mechanism, preventing the dryer from starting. This may occur if the door is not... ✅ DIY Fixable
What Does Error E40 Mean?
The AEG dryer E40 error code indicates a malfunction in the door lock mechanism, preventing the dryer from starting. This may occur if the door is not closed properly or there is an issue with the door lock or sensor. Symptoms include the dryer not starting despite the door appearing closed, and the door lock not detecting a closed door.
Common Symptoms:
- Dryer does not start with E40 displayed
- Door may appear closed but machine won’t begin cycle
- Door lock/sensor not detecting closed door
Possible Causes
- Door not closed completely (high)
- Faulty door lock or sensor mechanism (medium)
How to Fix Error E40
DIY Fix Check and reseat the dryer door
- Ensure dryer is off.
- Check that no laundry is caught between the door and seal.
- Close the door firmly until you hear a click.
- Try restarting the dryer cycle.
DIY Fix Perform a basic reset
- Unplug the dryer from the power socket.
- Wait 30 seconds.
- Plug the dryer back in.
- Select a program and try to start the cycle.
Technician Only Inspect/replace door lock or sensor
- Disconnect power to the dryer.
- Remove the top/front panel to access the door latch assembly.
- Test the door switch and sensor continuity with a multimeter.
- Replace the door lock assembly if faulty.
- Reassemble and test operation.
Parts needed: door latch/lock assembly, door sensor/switch
- If door closure checks and reset do not clear E40
- If door lock mechanism is broken or sensor wiring seems damaged
Next step
Choose the next step for E40
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Door Latch Assembly
Mechanically secures the appliance door and may operate a door-closed safety switch.
- Typical part-only price
- $15 - $80
- DIY difficulty
- Medium
- Estimated time
- 20-60 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Dryer parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Dryer Vent Cleaning Kit
Helps remove routine lint buildup from an accessible dryer vent path. It does not diagnose or repair an E-code or failed component.
Lint Trap Cleaning Brush
A narrow brush for routine cleaning around an accessible lint screen and housing.
Dryer Vent Hose Kit
A replacement exhaust duct option for visibly crushed or damaged external venting. Check diameter, length, local code, and installation clearance.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does E40 error mean on AEG dryer?
E40 error indicates a malfunction in the door lock mechanism, preventing the dryer from starting.
Can I fix AEG dryer E40 error myself?
Yes, you can check and reseat the dryer door or perform a basic reset by unplugging and replugging the dryer.
How much does it cost to fix E40 error?
Repair costs for E40 error typically range from $50 to $200, depending on parts and labor.
When should I call a technician for E40?
Call a technician if door checks and resets do not clear the E40 error or if there's visible damage to the door lock or sensor.
Sources & References
- AEG support: Tumble dryer displays error message E40 (official)
- AEG support: German page for E40 error (official)
Data last verified: 2026-07-31
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