Monogram dishwasher-loose handle

Depends on the brand and type of handle. I'll give you a few general ideas. The first easy one is to look under both ends of the handle for small set screws. If you see them, a small allen wrench should tighten the set screws and the handle. The next type requires the removal of either the inner door panel or outer panel. Some dishwashers will have screws along the inner edge of the door panel. you remove the screws and either the inner panel will come loose or the outer panel will come off (depends on make and model) Once the door is apart you should be able to see the handle screws to tighten. Some doors also have a screw in both bottom corners facing upward that may need removed . Best I can do at this time.

This model comes with two types of doors. One with a single panel with integrated control on top or a two part door with control unit in front. The handle varies.

If you have a single door panel with handle bar across from right to left then you need to carefully unscrew the back panel screws and free up the front panel. the handle is screwed to the front panel from inside. Once you tighten carefully put the back door panel in and tighten. Take photos along the way to make sure you get back where you started. Also unplug dishwasher before working on it.

If you have a two part door with front control then handle and access to it is different. See diagram on this website for blow up of the panel and location of handle (part 713).

ESCUTCHEON DOOR ASSEMBLY Diagram Parts List for Model GLD5868V15SS GE...

You can magnify the image or take a full screen view for clarity.

Open the door and loosen the self threading screws around the sides of the inner door panel. Once this has been achieved lift the inner panel up so that you can access the door handle screws. Tighten these fasteners and reassemble the door panel.

Pry out the red / blue plastic piece in the front and tighten with an ALLEN wrench.

Ok you need to use plastic or rubber washers against the glass so it doesn't break. To stop the handle comming loose again you need to put "Lock Tight" on the screw threads then tighten carefully only untill the handle isn't loose. You can get this from any good hardware store. cheers

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Take the inside panel off.  The 2 screws near the latch only need to be loosened.  Once the handle is off, you will find an allen bolt inside the shaft of the handle support.  Tighten and you are done.

Handle needs to be replaced part# 154537303 (blk). Un plug unit, take 4 screws from behind blk control panel out. Panel will fold down, remove two torx head screws from door latch, replace with new one and put it back together and your done.

THIS IS THE SOLUTION!
I was having the same problem with my Monogram dishwasher and oven.  Here's what to do.  You must fully remove the handle from the appliance.  Down the barrel of the standoff is a hex screw that, when tightened with an allen wrench, will draw the standoff tight to the handle again.  There is no need to remove the end caps. 

handle secured by 4 stainless stand offs on each door correct?, i would look closley at the underneath of the standoffs should be a screw to tighten/loosen. . actually lookin at diagram theses are comlete doorskins wrapped around the door itself you might need to remove teh screws on top and bottom ofr door skins and tighten from behind s/s skin

try removing the handle, that will expose the mounts for the handle. You should be able to tighten them after removing the handle.