Andersen awning operator

A home owner from Shawnee, OK says:
Windows installed probably 20 - 30 years ago. 2 windows per section x 3 sections with about 8" separation between each 2 window section along wall of upstairs room. Of the 6 cranks, only about 3 will push window out and up. The others either grind and sound stripped or if window is out must be pulled back in by hand as crank is turned.
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Bob from SWISCO responded:

Take a look at our 39-099 Andersen operator. Look over the dimensions and see if this matches up. Keep in mind that it's made for windows made from 1999 to today. If your window was made from 1995 to 1998, you'll need our 39-343 instead.

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