I would agree with dougie, bar his comment on removal of bottom screws. suggest you srat on screws from the bottom working up evenly on both sides leaving the penultimate screw in on either side.
these and the top screws hold in the control panel.
once ou have undone the ones described in para one, the rest of the door panel and some foam comes away. remove this to replace later.
then take off the top panel - the reason I suggest this method is that the top panel is wired in and you dont want to risk any wires unconnecting.
once off could see the issue, in my case the pin bar that holds the spring had fallen out and one end of the spring was snapped.
I am off to hotpoint to order a new spring, but looks easy to fit. will post where I get spring from later
Thomas, April 2010