Bosch Washer Error Code E:03

E:03 means the washer's door lock has failed to unlock when it was supposed to. The control board sent the command to release the door latch but did not get confirmation that the lock opened. This is caused by either a jammed or faulty door lock mechanism or a problem with the wire harness connected to it.

A reset may temporarily clear the error display, but if the underlying cause is a faulty door lock or damaged wiring, the code will return as soon as the machine attempts to lock or unlock the door again. A reset is not a fix and should only be used as part of the diagnostic process after addressing the root cause.

If only the wire harness connector needs cleaning or reseating, the repair cost may be minimal, covering just a service call. If the door lock assembly needs to be replaced, total repair costs including parts and labor typically range from around 100 dollars to 250 dollars depending on the specific model and your location. Control board replacement, if required, would fall at the higher end of repair costs.

Start by inspecting the door lock assembly for physical obstructions and checking the wire harness and connector for damage, looseness, or corrosion. If the wiring is intact, test the door lock mechanism itself for proper operation. A faulty lock assembly will need to be replaced to clear the error permanently.

You should not attempt to force the door open or continue using the washer until the fault is diagnosed and repaired. The error indicates a failure in the door lock system, which is a critical safety component. Running the machine with a compromised door lock could result in water leakage or the door opening unexpectedly during a cycle.