SWISCO - The Replacement Hardware Authority

Jamb adjustment to get rid of gap

A handy person from Wisconsin says:
I have daylight between my sash and jamb on a vinyl replacement window. Is there hardware that can be purchased to install between the old window frame and the replacment so the window can be adjusted without removing molding. I would like to do minor adjustments with the changing seasons.
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Paul from SWISCO responded:
Good afternoon! This is a great question. Look along the window jamb channel. Right in the middle, between the top and bottom sash, you should see an adjusting screw. If the jamb channels aren't caulked, you should be able to turn the screw in to close the gap between the sash and the frame. If the caulk is preventing it from moving, you might have to cut it away. Let me know how this works out.
A handy person from Wisconsin says:
I cleared the caulk and when I turn the screw clock wise nothing happened and the screw got tight. When I turned it counter clockwise the metal thing on the side of the jamb just gets loose and then falls off. The screw also gets loose. I can put my finger on the metal thing and screw just backs out. I thought this was a adjuster, but it just doesn't do anything. Any suggestions. I will take a picture of it to send you when I get home. Thanks!!
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Paul from SWISCO responded:
Ah, I see. Then at this point, I recommend that you get some wood shims and manually bring in the window jamb.
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