Window does not stay up

A landlord from Camden, NJ says:
Part that holds up the window

My push my window upward and it comes down does not stay up
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Tom from SWISCO responded:

This part is known as a balance. Specifically, you have a coil type balance. See our S140-8, I think this will work for you as a replacement.

How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
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Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
GUIDE
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