Door will not open after pushing door button
Microwave door will not open after pushing door button
The standard answer on repairing microwaves is "just say no". These are one of the very few items that almost all of us will not attempt a repair on. They can kill you. They are cheap, easy to replace. Or you can take it to a pro and hope he doesn't get killed.
if the button won't push in to open the microwave door, one of the little ears that holds the button in place has broke off and is keeping the button fron being depress. Find someone who works on appliances remove the cabinet cover, remove the door release latch, pop out the button and remove the broke ear, pop the button back in, replace the latch, reinstall the cabinet cover and your good to go.
Our 2 year old Whirlpool stainless steel microwave finally quit opening with the push button. After pushing the button and opposite end at the same time to open it for a few months my husband had the bright idea to simply open the door and push down on the top edge of the door closest to the button. Miraculously it began opening with the button!!! Haven't had an issue with it for several weeks and will be trying this should it happen again. Worth a try ;)