Hi and Welcome to Just Answer,
Ok, let's take a look at this;
That sounds like the door switch is failing, if she drops the door down it may be making the contact it needs to finish.
Can you give me the model number; I can then get you a parts breakdown and part number.
If you need more help Let me know
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If there is anything else let me know, If not click accept. Thank You Michael L.
These are enclosed switches, you can try to blow some air inside the switch to see if maybe some lint or something is in it.
They are only around $20 to replace here is the parts list and a place to order if you wish
I am sorry, I should have posted that to start with
it is #3 on the breakdown, and Part number PS65213