AEG Washer Error Code E42

E42 on an AEG washer means the door or lid failed to unlock within 4 minutes after the end of a wash program. The error points specifically to a defective triac inside the door lock assembly. The triac is the semiconductor component that controls the electrical switching of the lock mechanism. Until the fault is resolved, the machine will not allow normal operation.

You should not continue using the washer while E42 is active. The door lock fault means the lid may not unlock reliably at the end of a cycle, which creates a practical problem of not being able to access your laundry. Running cycles with a faulty lock can also put additional strain on the control board. Resolve the error before resuming normal use.

If the repair requires a new door lock assembly and you do the work yourself, parts typically range from around 20 to 60 dollars depending on the specific model. If you hire a technician, total repair costs including labor generally range from 80 to 180 dollars. Costs can be higher if the control board is found to be at fault instead of, or in addition to, the door lock.

A knowledgeable DIYer can address this repair by first checking the wiring harness and connectors between the control board and the door lock for damage or loose connections. If wiring is intact, the next step is replacing the door lock assembly, which is the recommended repair for a defective triac. Always disconnect power before inspecting or replacing any components.

A power reset may temporarily clear the error code display, but it will not fix the underlying fault. If the triac inside the door lock is defective, the error will return once the machine completes another cycle and the lock again fails to release within 4 minutes. A proper repair requires inspecting and most likely replacing the door lock assembly.