Washer intermittently fails to lock or unlock; E43 displayed

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Shorted door lock coil, Failed triac on main PCB, Wiring short between lock and PCB, Surge damage

How to Fix / Troubleshooting

Safety first: Unplug the washer before testing the lock or PCB.

Steps to check and address E43:

Test door lock coil: Measure resistance of the lock coil. Replace the lock if shorted or out of spec.
Inspect wiring: Check the harness from lock to PCB for chafing or shorts to chassis.

When to call a technician: If the lock and wiring are good, the PCB triac is likely faulty and the board should be repaired or replaced by a Siemens technician.

Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board

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