Why does my PTH093A35AB Amana PTAC unit make a loud humming or vibrating sound when on high cool or low cool?

SOURCE: how do i charge a AMANA Ptac with R22 freon

Also, if you get caught working on ANY freon based refrigeration without a license, you could face a large fine. Freon isn't $3 per pound anymore, it's quite expensive and you don't want any of it wasted. Have a licensed technician do the work. He will know exactly how much refrigerant your system needs, and he can remove what's there and add to it.

SOURCE: Amana PTAC

sounds like ur board is gone out and needs replacing if u dont no about these units i dont advise trying to do this trust me save urself some money and headach and call a tech

SOURCE: I have thru-wall PTAC Amana PTH093B35AM unit. I

see if you can find a new board the power failure fried it