Identify relay for door lock

If the lock itself and its wiring really are sound, the control board is a fair suspicion on these Electrolux-built machines. That said, I’d be a bit careful about assuming it’s a dedicated “door lock relay” straight away, because on some versions the lock is driven via a triac or track on the PCB rather than a simple relay.

Before inspecting internal parts, isolate the appliance from the mains.

1. Check exactly what the fault is Does the lock fail to lock at the start, or does it lock but fail to release at the end? That matters. A non-opening door can also be caused by the control still “seeing” water in the drum, so confirm it is fully drained when the fault appears.

2. Verify voltage at the door interlock With the machine reassembled enough to run safely, check whether the interlock is being fed when a cycle starts, and whether the feed is removed at the end. If the board never sends supply, the fault is upstream on the PCB or harness.

3. Inspect the board rather than hunting one relay blind Remove the module and look for: - burnt tracks - dry joints, especially around larger components/connectors - heat marks near relays/triacs - damaged connector pins for the lock circuit

4. Trace the lock wires from the harness plug on the PCB That usually identifies the switching component much faster than a service sheet. Follow the PCB track from the door lock connector to the controlling device.

5. Don’t overlook intermittent harness faults Tug-test and continuity-check the loom from board to lock. Intermittent breaks near the cabinet flex points are common.

If you can post clear photos of the PCB front and back, especially around the door lock connector, it should be possible to narrow down whether it’s a relay, triac, or bad solder joint. For any live testing or board-level repair, if you’re not fully confident, use a qualified engineer.

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