There is a PTC in the door lock. The small amount of heat from this device holds the door closed. You can only overcome this safety device by disconnecting the mains and waiting for the PTC to cool down (normally about 1 minute). Be carefull. The door would open whether there is water present in the drum or not.
Why do you want to bypass this safety device? Is the door stuck?
Hotpoint Man, February 2006