Hi Lisa,
Replacing the door latch on any microwave oven is normaly straight forward enough. It involves slitting the door assembly by removing the door choke cover, usually the plastic surround on the inside of the door, the removing and replacing the door hooks. Please bear in mind that the door should be checked for leakage after repair by a qualified tech.
kindest regards
patrick
microwave-repairs.co.uk
patrick
April 2009