If the door hook is broken replace it.
Fix microwave door latch.
For safety disconnect your appliance from the power source before beginning.
Remove broken latch replace with new latch some playing around make sure spring moves freely.
Use care when snapping the latch into the holder.
Locate and remove the door latch assembly.
Ge microwave oven.
It will be found behind the inner door panel.
I used a butter knife gently pry off the cover around glass on back of door.
Pull door off microwave lay on flt surface.
Tightening the hinges on your microwave door is a task you can perform yourself in a matter of minutes.
Since the door hook is made of plastic it can break due to regular wear.
Unscrew 4 screws on back of door in channel that has bee exposed.
The door hook engages with the door latch to keep the door closed during operation.
There may be more than one.
In fact if the door latch isn t snapped shut the microwave won t function at all.
The latch originally broke when the microwave was just over a year old.
Se the door properly preventing the door from opening.
Took cover off removed timer panel assembly and replaced door latch.
Being a repairman i jury rigged it and it lasted several years but it failed completely this time and had to be replaced.
One way a microwave door can cease to function properly is if the hinges are loose or damaged.
Scott halseth the switch is called door sensing switch part number wb24x829.
The latch assembly is spring loaded to provide the necessary tension to engage the hooks.
When the door is opened during a cook cycle the monitor switch door sensing switch primary interlock switch and power relay are deactivated.
You could use a multimeter and see if you get.
How to repair your microwave door latch.
Lift up inner door area on handle side.
How to inspect a microwave door latch assembly.