Just undo the screws on the left and right hand side along the bottom, undo the first and last screws on the front bottom under the door. Pull the timer knob off and undo the screw behind it and the plastic panel should pull off then it's a matter of lifting the steel sides and top off.
There might be a couple of screws to undo at the rear I can't remember but you will soon find out.
bob, October 2010