Whirlpool microwave door won't release

The push mechanism won’t push hard enough to release the other two door interlock catches. The door is getting to where it won’t open has to be persuaded by lifting on the bottom of the door.The microwave works fine and has outlasted the previous three.

The post below sounds like the same problem i am having. I did not see an answer as to how to fix it. Can anyone help?

[QUOTE=jim turbo;704093]The push mechanism won’t push hard enough to release the other two door interlock catches. The door is getting to where it won’t open has to be persuaded by lifting on the bottom of the door.The microwave works fine and has outlasted the previous three.[/QUOTE]