Normally a sticky door switch can be rectified by lubricating the door seal where it meets the door rubber. This allows the door to close smoothly and engage the interlock. If it needs to be removed! Two screws on the front, inside the door recess will release the interlock from the casing. You'll have to pull the door rubber away so you can the interlock out through the front . Dont forget to turn off the power first.
Richard Brooks
December 2007