crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

There are two parts to that door switch, here they are on your model along with how to test them:

https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Microwave/68-6-877692-/New/Kenmore-Microwave-shuts-off-after-a-few-seconds-80082700

crwdns2915684:0crwdne2915684:0:

open