Acorn window

A quick learner from Indianola, IA 50125 says:
double hung and single hung both when unlock they slam down
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Casey from SWISCO responded:


It sounds like your side-loaded balances that are responsible for keeping the sash raised may have failed. To recommend replacements for you, we'll need to see a photo of the balance removed from the window, as well as the length and any numbers stamped on the balance itself. Thank you!

26-017 : 1-1/4
1-1/4" Spring Retainer
Slide Latch Assembly Diagram
Slide Latch Assembly Diagram
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