Tom from SWISCO responded:
June 4, 2020
It's possible you may need the 39-362 adapter plate. Some Andersen operators made from 1995 to 1998 have a slightly different design. The 39-264 can replace them, but they require this adapter plate. There should be a date etched in the corner of the glass that you can use to confirm this. If your window as made from 1995 to 1998, then you need the 39-362 to get the new style operator to work. |