The part(s) or condition(s) listed below for the symptom Microwave door won't open are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
The door hook engages with the door latch to keep the door closed during operation. Since the door hook is made of plastic, it can break due to regular wear. If the door hook is broken, it won’t release the door properly, preventing the door from opening. If the door hook is broken, replace it.