Error Code E42

The AEG, Electrolux, and Quelle-Privileg washing machine error code E42 indicates a severe fault within the Door Lock or Door Interlock Mechanism. This error is triggered when the machine’s control board (PCC) fails to receive the correct signal confirming that the door is securely locked before the cycle begins, or if the lock fails to release the door properly after the washing cycle has completed.

Since the door lock is a crucial safety component—preventing water leaks and injury—the machine will immediately halt operation and display the E42 code until the issue is resolved.

Meaning of the AEG/Electrolux/Quelle-Privileg E42 Error Code

The E42 error specifically refers to an electrical communication breakdown involving the door interlock. When a wash program starts, the control board sends power to the door lock solenoid or PTC resistor. If the expected electrical feedback signal (confirming the lock has engaged) is not returned to the control board within a few seconds, the machine assumes the door is unsafe or the locking component is defective, resulting in the E42 warning.

Possible Causes for the E42 Error

• Door Not Fully Closed: Laundry items (especially small socks or towels) may be trapped between the door frame and the rubber gasket (boot seal), physically preventing the door hook from fully seating in the interlock assembly.
• Misalignment of the Door and Latch: The door hinge may have shifted or the striker plate (the plastic or metal piece on the door that slides into the lock) may be bent, preventing proper alignment and contact with the lock switch.
• Defective Door Interlock (The Most Common Cause): The mechanical locking mechanism itself has failed. This could be due to a burnt-out PTC resistor, a broken solenoid, or internal wear that prevents the confirmation switch from engaging.
• Wiring Harness Damage: There may be broken, loose, or corroded wires running from the door lock assembly back to the main electronic control board. This interrupts the crucial electrical feedback signal.
• Faulty Electronic Control Board (PCC/PCB): In rare cases, the main control board itself may be unable to send power to the door lock or process the return signal correctly, even if the lock unit is functional.

Step-by-Step E42 Troubleshooting Steps

1. Perform Safety Disconnection and Inspection First, for your safety, immediately turn off the washing machine and unplug it from the power outlet. Wait 5-10 minutes for any residual charge to dissipate. Then, thoroughly inspect the door.

2. Check for Obstructions and Alignment Open the door (if possible) and check the rubber door seal and the door cavity. Remove any clothing, debris, or foreign objects that may be preventing the door from closing flush. Verify that the door hook is straight and not warped. Try closing the door firmly, ensuring you hear the solid, definitive “click” of the mechanical latch engaging.

3. Test for Resetting the Interlock If the door is stuck locked (E42 appears after a cycle ends), try powering the machine on and off several times. In some models, the E42 code can sometimes be cleared by running a specific reset cycle (consult your specific AEG/Electrolux manual for reset procedures, often involving button combinations).

4. Inspect the Door Lock Component (Technical Step) If the error persists, the door lock assembly needs inspection.

• Unplug the machine again.
• Access the door lock component (usually mounted on the inner front panel, accessible by removing the front collar/boot seal retaining ring or the top panel).
• Visually inspect the lock unit and the wiring plug for any signs of physical damage, corrosion, or burnt plastic/scorching (a strong indication of electrical failure).
• If you have a multimeter, you can test the continuity of the lock component according to your specific model’s resistance values. If the component shows open resistance when it should be closed, it must be replaced.

5. Check Wiring Connections If the lock appears fine, trace the wiring harness back to the main control board. Look for pinched wires, signs of mouse damage, or loose connections at the terminal plugs on both ends (the lock end and the PCB end). Secure any loose connectors.

6. Install a New Door Interlock If the visual inspection or multimeter test confirms the interlock is faulty, replace the entire door lock assembly with an OEM or equivalent part specific to your machine model (AEG/Electrolux locks are very model-specific). Ensure the machine is unplugged during installation, and re-check the alignment after fitting the new part.

When to Call a Professional Technician

While replacing a door lock is often a straightforward DIY fix, you should contact a certified appliance repair professional if:

1. The E42 error persists immediately after you have successfully installed a brand-new door lock unit. This indicates the primary fault lies with the Electronic Control Board (PCB), which is an expensive and complex component requiring specialized diagnosis.
2. You are uncomfortable working with electrical components or opening the main service panels of the washing machine.
3. The door is irrevocably jammed shut, making it impossible to access the interior lock mechanism without potentially damaging the door or panel.