Tom from SWISCO responded:
July 18, 2017
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Paul from SWISCO responded:
July 24, 2017
The manufacturer of your windows used 90-009 locks. You don't need the shims. The problem is that the top and bottom sashes aren't meshing correctly. First, remove the top and bottom sashes and clean the interlocks. Sometimes things fall into the interlocks, preventing the sashes from meshing, or the frame has a nick. Check the top channel (where the sash fits into it) and the bottom sill to see if anything is causing the sashes not to mesh.
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