F&P. Which way should I turn the allen key to tighten the door handle from underneath?

SOURCE: Fisher Paykel fridge door handle loose

Yes hello, I had the same problem - similar fridge model.  Mine was the fridge (not freezer) door handle ie. the upper door.  There are no small holes on the bottom of my fridge handle.  Working from the outer door edge, I gently prized loose the plastic trim located under the door.  I didn't take it completely off, just loosened about one quarter of the length, enough to flex the trim downward so that I could then access the phillips head screw that secures the fridge handle from the inside of the door.  The trim will prevent you from using a conventional screw driver to tighten the screw.  I used a screw driver bit which is only 25mm long.  It has an hexagonal end to which I applied a small spanner and voila - the handle is once more secure.  Good luck.

SOURCE: Freezer door handle loose

u could always set the handle in place where it needs to be and use caulk or super glue to go around the handle and that should help it stay in place if that doesnt work the website www.amana.com to see if it has warranty for the broken handle good luck

SOURCE: How do I tighten the refridgerator door handle on a AFD2535 french door refrigerator

Instructions for removing and installing door handles are on pages 5-6 of manual at:
http://shop.amana.com/assets/pdfs/literature/User%20Instructions%20-%20W10175445A.pdf

SOURCE: Loose freezer door handle

There is a "set screw" on the underside of the posts that connect the handle to the mounting posts on the face of the door of my Jenn-Air bottom freezer. Use an Allen wrench to loosen the set crew, which is very small (my Jenn-Air requires a 3/32" Allen wrench), and then tighten the bolt on the mounting post on the face of the freezer door. Position the handle over the post, then tighten the set screws with the Allen wrench. Cynthia

SOURCE: Outside door handle loose - how do I remove inside panel to tighten handle?

I had the same problem with this model. Bluntcow is correct, 2.5mm hex screw at the bottom of the handles (the top one is a fair way in).