What usually breaks is the door open lever.
The outer cover will need to be removed to
diagnose and repair this. Please unplug the oven first.
you or someone you know wants to look into this, we have critical
safety, disassembly, and troubleshooting info at our site, and our link
is at our listing
here on FixYa.
it is apart, you'll be able to see how the door open button would press
against the door open lever, which would then lift up against the door
latch heads (hook-like projections on the door) and the door should
You can probably find exploded views and order parts by entering your model number here at the Sears parts site
. The best place to order Sharp parts is Tritronics
.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.