How do unlock the washing machine IQ300 - Washing Machines

load is unbalanced coming out of the spin cycle hitting the housing.

hi krishan.
check this link out might help you get it sorted.
washing machine siemens iq300 door lock but still the door opened signed...

Seimins washing machine iq300 model
Nr.WD12D523GB/02WD child lock activate

Contact the vendor from whom you purchased the machine. If it's brand new, they should replace it if it is defective.

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Contact manufacturer or service agent

Hi, I managed to do it with an IQ300 WM12N218FR :
-> turn off
-> switch to first program (coton)
-> wait five seconds
-> press AND MAINTAIN start button
-> switch to second program
-> release start button
-> then the display show 0 to 4 (0 means no sound, 4 high volume). you can change the value each time you press the start button
-> turn off after the desired value.

Regards

This means that the door is not being closed. It might be a bad door switch.

Any tips to open the drain cap when it is stuck?

unplug it from the wall leave it unplugged for at least a hour

This problem has nothing to do with water in the machine. My IQ300 regularly refuses to open on the drying cycle! You have to open the small round compartment beneath the door and pull down on the black plastic strap to the right - you may need a utensil to pry it out. What a rubbish machine.