Use caution as the outer glass door may be heavy.
Repair microwave over door lock.
For safety disconnect your appliance from the power source before beginning.
Depending on the model involved the panels may be held in place with screws from the inside bottom or sides.
If you misadjust the switch the unit may start with the door not completely sealed.
Locate and remove the door latch assembly.
A primary secondary and monitor switch all actuate to keep the microwave from cooking your kitchen while the door is open.
Remove two philips screws that hold the grill in place on top of the microwave.
Unplug the unit and remove the inner and outer door panels to access the torsion springs that are located at the bottom front of the door.
The reason for the interlock is to prevent operation of the microwave and the resulting generation of microwave radiation while the door is open.
How to inspect a microwave door latch assembly.
The door hook engages with the door latch to keep the door closed during operation.
Locate and remove the one philips screw that holds the control panel in place.
Since the door hook is made of plastic it can break due to regular wear.
Remove the grill and lay aside.
It will be found behind the inner door panel.
If the door hook is broken replace it.