How to Adjust and Operate a Milgard Fiberglass and Vinyl French Door

Adjusting your Milgard French door helps it operate smoothly. Follow these instructions to adjust the locks and panels on your door.

Safety Precautions:  Activities in this video are appropriate for individuals with an understanding of how to use simple hand tool. Remember to wear eye protection and make sure that pets and small children are not present when performing these activities.  Questions? Call 1-800-Milgard or visit

You’ll need a ¼ inch allen key and a number two phillips head screwdriver.

Begin by checking the gaps between the door panels at the center frames and sides.  And with the door open, check the bottom of each hinge bolt.  Determine the direction you need to adjust each panel to achieve equal sight lines.  To raise and lower the door panel start with the top hinge.  Using the ¼ inch allen key, rotate the bolt clockwise to raise the panel up, and counter clockwise to lower the panel.  Once you achieve the right adjusted height, raise or lower the other two hinges to the same setting.

To adjust panels for the side and center gaps, locate the hinge adjustment screw, this is attached to the panel on the inside of the hinge.  Use a number two phillips head screwdriver to make the adjustment.  Rotate clockwise to move the panel towards the hinge side, rotate counterclockwise to move the panel towards the center.  Be careful not to over-turn the adjustment screw.

Now let’s operate the locks.  To lock the French door, begin by closing the passive panel.  Rotate the handle up until it stops.  Rotate the thumb turn to activate the lock.  Now do the same for the active panel on the other side.  To unlock the French door, begin by rotating the thumb turn.  Rotate the handle down to disengage all locking points, then open the door.  If needed adjust the mortise latch to the correct position.  Compress the strike pin, pull the handle up to activate the lock.  The mortise latch can be pulled out and rotated to the correct position.  Pull the handle down to disengage and close the door.